The theme was "Virus", so I did a bunch of research and did this comic on phage viruses.
The begining text translates like so:
"In 1963 microbiologistes did a series of experiments using type T-4 phages, wich are viruses whose target is certain types of bacteria. The aim of these tests were to find a new alternative to antibiotiques. The phage viruses, whose natural habitat is the mamilian gut, are prepared in a liquide solution or as a pill, and consumed oraly."
One type of virus in perticular looks like that, with a few variations. Type in "T-4 virus" in wikipedia and you'll see it's legit. Some other viruses are tiny little blobs and other are spirals and whatnot. Fun stuff.