<h2><SPAN name="chapter10" id="chapter10"></SPAN>CHAPTER 10</h2>
<h3>THE BOOMERANG CLUE</h3>
<p>It was a virus, beyond doubt. The electron microscope
told them that, now that they had the substance isolated
and could examine it. In the culture tubes in the <i>Lancet</i>'s
incubators, it would begin to grow nicely, and then falter
and die, but when guinea pigs were inoculated in the ship's
laboratory, the substance proved its virulence. The animals
injected with tiny bits of the substance grew sick within
hours and very quickly died.</p>
<p>The call to the Hospital Ship was canceled as the three
doctors worked in feverish excitement. Here at last was
something they could grapple with, something so common
among the races of the galaxy that the doctors felt certain
that they could cope with it. Very few, if any, higher life
forms existed that did not have some sort of submicroscopic
parasite afflicting them. Bacterial infection was a threat on
every inhabited world, and the viruses—the tiniest of all
submicroscopic organisms—were the most difficult and dangerous
of them all.<SPAN name="page122" id="page122"></SPAN></p>
<p>And yet virus plagues had been stopped before, and they
could be stopped again.</p>
<p>Jack radioed down to the planet's surface that the diagnosis
had been made; as soon as the proper medications
could be prepared, the doctors would land to begin treatment.
There was a new flicker of hopefulness in the Bruckian's
response, and an appeal to hurry. With renewed energy
the doctors went back to the lab to start working on the
new data.</p>
<p>But trouble continued to dog them. This was no ordinary
virus. It proved resistant to every one of the antibiotics and
antiviral agents in the <i>Lancet</i>'s stockroom. No drug seemed
to affect it, and its molecular structure was different from
any virus that had ever been recorded before.</p>
<p>"If one of the drugs would only just slow it up a little,
we'd be ahead," Tiger said in perplexity. "We don't have
anything that even touches it, not even the purified globulins."</p>
<p>"What about antibodies from the infected people?" Jack
suggested. "In every virus disease I've ever heard of, the
victim's own body starts making antibodies against the
invading virus. If enough antibodies are made fast enough,
the virus dies and the patient is immune from then on."</p>
<p>"Well, these people don't seem to be making any antibodies
at all," Tiger said. "At least not as far as I can see.
If they were, at least some of them would be recovering
from the disease. So far not a single one has recovered once
the thing started. They all just go ahead and die."</p>
<p>"I wonder," Dal said, "if Fuzzy had any defense."</p>
<p>Jack looked up. "How do you mean?"</p>
<p>"Well, Fuzzy was infected, we know that. He might have
died too, if we hadn't caught it in time—but as it worked
out, he didn't. In fact, he looks pretty healthy right now."<SPAN name="page123" id="page123"></SPAN></p>
<p>"That's fine for Fuzzy," Jack said impatiently, "but I don't
see how we can push the whole population of 31 Brucker VII
through a virus filter. They're flesh-and-blood creatures."</p>
<p>"That's not what I mean," Dal said. "Maybe Fuzzy's body
developed antibodies against the virus while he was infected.
Remember, he doesn't have a rigid body structure like we do.
He's mostly just basic protein, and he can synthesize pretty
much anything he wants to or needs to."</p>
<p>Jack blinked. "It's an idea, at least. Is there any way we
can get some of his body fluid away from him? Without
getting bit, I mean?"</p>
<p>"No problem there," Dal said. "He can regenerate pretty
fast if he has enough of the right kind of food. He won't miss
an ounce or two of excess tissue."</p>
<p>He took a beaker over to Fuzzy's platform and began
squeezing off a little blob of pink material. Fuzzy seemed
to sense what Dal wanted; obligingly he thrust out a little
pseudopod which Dal pinched off into the beaker. With the
addition of a small amount of saline solution, the tissue
dissolved into thin, pink suspension.</p>
<p>In the laboratory they found two or three of the guinea
pigs in the last stages of the infection, and injected them with
a tiny bit of the pink solution. The effect was almost unbelievable.
Within twenty minutes all of the injected animals
began to perk up, their eyes brighter, nibbling at the food
in their cages, while the ones that had not been injected
got sicker and sicker.</p>
<p>"Well, there's our answer," Jack said eagerly. "If we can
get some of this stuff injected into our friends down below,
we may be able to protect the healthy ones from getting the
plague, and cure the sick ones as well. If we still have enough
time, that is."<SPAN name="page124" id="page124"></SPAN></p>
<p>They had landing permission from the Bruckian spokesman
within minutes, and an hour later the <i>Lancet</i> made an
orderly landing on a newly-repaved landing field near one
of the central cities on the seventh planet of 31 Brucker.</p>
<p>Tiger and Jack had obviously not exaggerated the strange
appearance of the towns and cities on this plague-ridden
planet, and Dal was appalled at the ravages of the disease
that they had come to fight. Only one out of ten of the
Bruckians was still uninfected, and another three out of the
ten were clearly in the late stages of the disease, walking
about blankly and blindly, stumbling into things in their
paths, falling to the ground and lying mute and helpless
until death came to release them. Under the glaring red sun,
weary parties of stretcher bearers went about the silent
streets, moving their grim cargo out to the mass graves at
the edge of the city.</p>
<p>The original spokesman who had come up to the <i>Lancet</i>
was dead, but another had taken his place as negotiator with
the doctors—an older, thinner Bruckian who looked as if he
carried the total burden of his people on his shoulders. He
greeted them eagerly at the landing field. "You have found
a solution!" he cried. "You have found a way to turn the
tide—but hurry! Every moment now is precious."</p>
<p>During the landing procedures, Dal had worked to prepare
enough of the precious antibody suspension, with
Fuzzy's co-operation, to handle a large number of inoculations.
By the time the ship touched down he had a dozen
flasks and several hundred syringes ready. Hundreds of the
unafflicted people were crowding around the ship, staring in
open wonder as Dal, Jack and Tiger came down the ladder
and went into close conference with the spokesman.</p>
<p>It took some time to explain to the spokesman why they
could not begin then and there with the mass inoculations<SPAN name="page125" id="page125"></SPAN>
against the plague. First, they needed test cases, in order to
make certain that what they thought would work in theory
actually produced the desired results. Controls were needed,
to be certain that the antibody suspension alone was bringing
about the changes seen and not something else. At last, orders
went out from the spokesman. Two hundred uninfected
Bruckians were admitted to a large roped-off area near the
ship, and another two hundred in late stages of the disease
were led stumbling into another closed area. Preliminary
skin-tests of the antibody suspension showed no sign of
untoward reaction. Dal began filling syringes while Tiger
and Jack started inoculating the two groups.</p>
<p>"If it works with these cases, it will be simple to immunize
the whole population," Tiger said. "From the amounts
we used on the guinea pigs, it looks as if only tiny amounts
are needed. We may even be able to train the Bruckians to
give the injections themselves."</p>
<p>"And if it works we ought to have a brand new medical
service contract ready for signature with Hospital Earth,"
Jack added eagerly. "It won't be long before we have those
Stars, you wait and see! If we can only get this done fast
enough."</p>
<p>They worked feverishly, particularly with the group of
terminal cases. Many were dying even as the shots were
being given, while the first symptoms of the disease were
appearing in some of the unafflicted ones. Swiftly Tiger and
Jack went from patient to patient while Dal kept check of
the names, numbers and locations of those that were inoculated.</p>
<p>And even before they were finished with the inoculations,
it was apparent that they were taking effect. Not one of the
infected patients died after inoculation was completed. The
series took three hours, and by the time the four hundred<SPAN name="page126" id="page126"></SPAN>
doses were administered, one thing seemed certain: that the
antibody was checking the deadly march of the disease in
some way.</p>
<p>The Bruckian spokesman was so excited he could hardly
contain himself; he wanted to start bringing in the rest of
the population at once. "We've almost exhausted this first
batch of the material," Dal told him. "We will have to prepare
more—but we will waste time trying to move a whole
planet's population here. Get a dozen aircraft ready, and a
dozen healthy, intelligent workers to help us. We can show
them how to use the material, and let them go out to the
other population centers all at once."</p>
<p>Back aboard the ship they started preparing a larger quantity
of the antibody suspension. Fuzzy had regenerated back
to normal weight again, and much to Dal's delight had been
splitting off small segments of pink protoplasm in a circle
all around him, as though anticipating further demands on
his resources. A quick test-run showed that the antibody was
also being regenerated. Fuzzy was voraciously hungry, but
the material in the second batch was still as powerful as in
the first.</p>
<p>The doctors were almost ready to go back down, loaded
with enough inoculum and syringes to equip themselves and
a dozen field workers when Jack suddenly stopped what he
was doing and cocked an ear toward the entrance lock.</p>
<p>"What's wrong?" Dal said.</p>
<p>"Listen a minute."</p>
<p>They stopped to listen. "I don't hear anything," Tiger
said.</p>
<p>Jack nodded. "I know. That's what I mean. They were
hollering their heads off when we came back aboard. Why
so quiet now?"</p>
<p>He crossed over to the viewscreen scanning the field<SPAN name="page127" id="page127"></SPAN>
below, and flipped on the switch. For a moment he just
stared. Then he said: "Come here a minute. I don't like the
looks of this at all."</p>
<p>Dal and Tiger crowded up to the screen. "What's the
matter?" Tiger said. "I don't see ... <i>wait a minute!</i>"</p>
<p>"Yes, you'd better look again," Jack said. "What do you
think, Dal?"</p>
<p>"We'd better get down there fast," Dal said, "and see
what's going on. It looks to me like we've got a tiger by
the tail...."</p>
<hr class="shorter" />
<p>They climbed down the ladder once again, with the antibody
flasks and sterile syringes strapped to their backs. But
this time the greeting was different from before.</p>
<p>The Bruckian spokesman and the others who had not yet
been inoculated drew back from them in terror as they
stepped to the ground. Before, the people on the field had
crowded in eagerly around the ship; now they were standing
in silent groups staring at the doctors fearfully and muttering
among themselves.</p>
<p>But the doctors could see only the inoculated people in
the two roped-off areas. Off to the right among the infected
Bruckians who had received the antibody there were no
new dead—but there was no change for the better, either.
The sick creatures drifted about aimlessly, milling like animals
in a cage, their faces blank, their jaws slack, hands
wandering foolishly. Not one of them had begun reacting
normally, not one showed any sign of recognition or recovery.</p>
<p>But the real horror was on the other side of the field.
Here were the healthy ones, the uninfected ones who had
received preventative inoculations. A few hours before they<SPAN name="page128" id="page128"></SPAN>
had been left standing in quiet, happy groups, talking among
themselves, laughing and joking....</p>
<p>But now they weren't talking any more. They stared
across at the doctors with slack faces and dazed eyes, their
feet shuffling aimlessly in the dust. All were alive, but only
half-alive. The intelligence and alertness were gone from
their faces; they were like the empty shells of the creatures
they had been a few hours before, indistinguishable from
the infected creatures in the other compound.</p>
<p>Jack turned to the Bruckian spokesman in alarm. "What's
happened here?" he asked. "What's become of the ones we
inoculated? Where have you taken them?"</p>
<p>The spokesman shrank back as though afraid Jack might
reach out to touch him. "Taken them!" he cried. "We have
moved none of them! Those are the ones you poisoned with
your needles. What have you done to make them like this?"</p>
<p>"It—it must be some sort of temporary reaction to the
injection," Jack faltered. "There was nothing that we used
that could possibly have given them the disease, we only
used a substance to help them fight it off."</p>
<p>The Bruckian was shaking his fist angrily. "It's no reaction,
it is the plague itself! What kind of evil are you
doing? You came here to help us, and instead you bring us
more misery. Do we not have enough of that to please you?"</p>
<p>Swiftly the doctors began examining the patients in both
enclosures, and on each side they found the same picture.
One by one they checked the ones that had previously been
untouched by the plague, and found only the sagging jaws
and idiot stares.</p>
<p>"There's no sense examining every one," Tiger said
finally. "They're all the same, every one."</p>
<p>"But this is impossible," Jack said, glancing apprehensively
at the growing mob of angry Bruckians outside the<SPAN name="page129" id="page129"></SPAN>
stockades. "What could have happened? What have we
done?"</p>
<p>"I don't know," Tiger said. "But whatever we've done
has turned into a boomerang. We knew that the antibody
might not work, and the disease might just go right ahead,
but we didn't anticipate anything like this."</p>
<p>"Maybe some foreign protein got into the batch," Dal
said.</p>
<p>Tiger shook his head. "It wouldn't behave like <i>this</i>. And
we were careful getting it ready. All we've done was inject
an antibody against a specific virus. All it could have done
was to kill the virus, but these people act as though they're
infected now."</p>
<p>"But they're not dying," Dal said. "And the sick ones
we injected stopped dying, too."</p>
<p>"So what do we do now?" Jack said.</p>
<p>"Get one of these that changed like this aboard ship and
go over him with a fine-toothed comb. We've got to find
out what's happened."</p>
<p>He led one of the stricken Bruckians by the hand like a
mindless dummy across the field toward the little group
where the spokesman and his party stood. The crowd on the
field were moving in closer; an angry cry went up when
Dal touched the sick creature.</p>
<p>"You'll have to keep this crowd under control," Dal said
to the spokesman. "We're going to take this one aboard the
ship and examine him to see what this reaction could be,
but this mob is beginning to sound dangerous."</p>
<p>"They're afraid," the spokesman said. "They want to
know what you've done to them, what this new curse is that
you bring in your syringes."</p>
<p>"It's not a curse, but something has gone wrong. We
need to learn what, in order to deal with it."<SPAN name="page130" id="page130"></SPAN></p>
<p>"The people are afraid and angry," the spokesman said.
"I don't know how long I can control them."</p>
<p>And indeed, the attitude of the crowd around the ship
was very strange. They were not just fearful; they were
terrified. As the doctors walked back to the ship leading the
stricken Bruckian behind them, the people shrank back with
dreadful cries, holding up their hands as if to ward off
some monstrous evil. Before, in the worst throes of the
plague, there had been no sign of this kind of reaction. The
people had seemed apathetic and miserable, resigned hopelessly
to their fate, but now they were reacting in abject
terror. It almost seemed that they were more afraid of these
walking shells of their former selves than they were of the
disease itself.</p>
<p>But as the doctors started up the ladder toward the entrance
lock the crowd surged in toward them with fists
raised in anger. "We'd better get help, and fast," Jack said
as he slammed the entrance lock closed behind them. "I don't
like the looks of this a bit. Dal, we'd better see what we can
learn from this poor creature here."</p>
<p>As Tiger headed for the earphones, Dal and Jack went to
work once again, checking the blood and other body fluids
from the stricken Bruckian. But now, incredibly, the results
of their tests were quite different from those they had obtained
before. The blood sugar and protein determinations
fell into the pattern they had originally expected for a
creature of this type. Even more surprising, the level of the
antibody against the plague virus was high—far higher than
it could have been from the tiny amount that was injected
into the creature.</p>
<p>"They must have been making it themselves," Dal said,
"and our inoculation was just the straw that broke the
camel's back. All of those people must have been on the<SPAN name="page131" id="page131"></SPAN>
brink of symptoms of the infection, and all we did was add
to the natural defenses they were already making."</p>
<p>"Then why did the symptoms appear?" Jack said. "If
that's true, we should have been <i>helping</i> them, and look at
them now!"</p>
<p>Tiger appeared at the door, scowling. "We've got real
trouble, now," he said. "I can't get through to a hospital
ship. In fact, I can't get a message out at all. These people
are jamming our radios."</p>
<p>"But why?" Dal said.</p>
<p>"I don't know, but take a look outside there."</p>
<p>Through the viewscreen it seemed as though the whole
field around the ship had filled up with the crowd. The
first reaction of terror now seemed to have given way to
blind fury; the people were shouting angrily, waving their
clenched fists at the ship as the spokesman tried to hold them
back.</p>
<p>Then there was a resounding crash from somewhere below,
and the ship lurched, throwing the doctors to the floor.
They staggered to their feet as another blow jolted the ship,
and another.</p>
<p>"Let's get a screen up," Tiger shouted. "Jack, get the
engines going. They're trying to board us, and I don't think
it'll be much fun if they ever break in."</p>
<p>In the control room they threw the switches that activated
a powerful protective energy screen around the ship. It was
a device that was carried by all GPP Ships as a means of protection
against physical attack. When activated, an energy
screen was virtually impregnable, but it could only be used
briefly; the power it required placed an enormous drain on
a ship's energy resources, and a year's nuclear fuel could be
consumed in a few hours.</p>
<p>Now the screen served its purpose. The ship steadied, still<SPAN name="page132" id="page132"></SPAN>
vibrating from the last assault, and the noise from below
ceased abruptly. But when Jack threw the switches to start
the engines, nothing happened at all.</p>
<p>"Look at that!" he cried, staring at the motionless dials.
"They're jamming our electrical system somehow. I can't
get any turn-over."</p>
<p>"Try it again," Tiger said. "We've got to get out of here.
If they break in, we're done for."</p>
<p>"They can't break through the screen," Dal said.</p>
<p>"Not as long as it lasts. But we can't keep it up indefinitely."</p>
<p>Once again they tried the radio equipment. There was no
response but the harsh static of the jamming signal from
the ground below. "It's no good," Tiger said finally. "We're
stuck here, and we can't even call for help. You'd think if
they were so scared of us they'd be glad to see us go."</p>
<p>"I think there's more to it than that," Dal said thoughtfully.
"This whole business has been crazy from the start.
This just fits in with all the rest." He picked Fuzzy off his
perch and set him on his shoulder as if to protect him from
some unsuspected threat. "Maybe they're afraid of us, I don't
know. But I think they're afraid of something else a whole
lot worse."</p>
<hr class="shorter" />
<p>There was nothing to be done but wait and stare hopelessly
at the mass of notes and records that they had collected
on the people of 31 Brucker VII and the plague that afflicted
them.</p>
<p>Until now, the <i>Lancet</i>'s crew had been too busy to stop
and piece the data together, to try to see the picture as a
whole. But now there was ample time, and the realization
of what had been happening here began to dawn on them.</p>
<p>They had followed the well-established principles step by<SPAN name="page133" id="page133"></SPAN>
step in studying these incredible people, and nothing had
come out as it should. In theory, the steps they had taken
should have yielded the answer. They had come to a planet
where an entire population was threatened with a dreadful
disease. They had identified the disease, found and isolated
the virus that caused it, and then developed an antibody
that effectively destroyed the virus—in the laboratory. But
when they had tried to apply the antibody in the afflicted
patients, the response had been totally unexpected. They had
stopped the march of death among those they had inoculated,
and had produced instead a condition that the people
seemed to dread far more than death.</p>
<p>"Let's face it," Dal said, "we bungled it somehow. We
should have had help here right from the start. I don't know
where we went wrong, but we've done something."</p>
<p>"Well, it wasn't your fault," Jack said gloomily. "If we
had the right diagnosis, this wouldn't have happened. And
I <i>still</i> can't see the diagnosis. All I've been able to come up
with is a nice mess."</p>
<p>"We're missing something, that's all," Dal said. "The
information is all here. We just aren't reading it right, somehow.
Somewhere in here is a key to the whole thing, and
we just can't see it."</p>
<p>They went back to the data again, going through it step
by step. This was Jack Alvarez's specialty—the technique of
diagnosis, the ability to take all the available information
about a race and about its illness and piece it together into
a pattern that made sense. Dal could see that Jack was now
bitterly angry with himself, yet at every turn he seemed to
strike another obstacle—some fact that didn't jibe, a missing
fragment here, a wrong answer there. With Dal and Tiger
helping he started back over the sequence of events, trying<SPAN name="page134" id="page134"></SPAN>
to make sense out of them, and came up squarely against
a blank wall.</p>
<p>The things they had done should have worked; instead,
they had failed. A specific antibody used against a specific
virus should have destroyed the virus or slowed its progress,
and there seemed to be no rational explanation for the dreadful
response of the uninfected ones who had been inoculated
for protection.</p>
<p>And as the doctors sifted through the data, the Bruckian
they had brought up from the enclosure sat staring off into
space, making small noises with his mouth and moving his
arms aimlessly. After a while they led him back to a bunk,
gave him a medicine for sleep and left him snoring gently.
Another hour passed as they pored over their notes, with
Tiger stopping from time to time to mop perspiration from
his forehead. All three were aware of the moving clock
hands, marking off the minutes that the force screen could
hold out.</p>
<p>And then Dal Timgar was digging into the pile of papers,
searching frantically for something he could not find. "That
first report we got," he said hoarsely. "There was something
in the very first information we ever saw on this planet...."</p>
<p>"You mean the Confederation's data? It's in the radio
log." Tiger pulled open the thick log book. "But what...."</p>
<p>"It's there, plain as day, I'm sure of it," Dal said. He read
through the report swiftly, until he came to the last paragraph—a
two-line description of the largest creatures the
original Exploration Ship had found on the planet, described
by them as totally unintelligent and only observed on a few
occasions in the course of the exploration. Dal read it, and
his hands were trembling as he handed the report to Jack.
"I knew the answer was there!" he said. "Take a look at that
again and think about it for a minute."<SPAN name="page135" id="page135"></SPAN></p>
<p>Jack read it through. "I don't see what you mean," he said.</p>
<p>"I mean that I think we've made a horrible mistake," Dal
said, "and I think I see now what it was. We've had this
whole thing exactly 100 per cent backward from the start,
and that explains everything that's happened here!"</p>
<p>Tiger peered over Jack's shoulder at the report. "Backward?"</p>
<p>"As backward as we could get it," Dal said. "We've
assumed all along that these flesh-and-blood creatures down
there were the ones that were calling us for help because of
a virus plague that was attacking and killing them. All right,
look at it the other way. Just suppose that the intelligent
creature that called us for help was the <i>virus</i>, and that those
flesh-and-blood creatures down there with the blank, stupid
faces are the <i>real</i> plague we ought to have been fighting all
along!"</p>
<hr class="longer" />
<p><SPAN name="page136" id="page136"></SPAN></p>
<div style="break-after:column;"></div><br />