🤔 Time Travelers Should Be a Lot More Worried About Viruses

One of the biggest threats would be viruses, an issue that’s seldom tackled in science fiction. “The problem with time travel is that if you went back in time, you would probably wipe out the whole population then, and they would probably kill you within months with viruses that you have no immunity to,” Carrier says. “So note to time travel authors: You have to come up with a universal immunity so that the time traveler who goes back is not bringing viruses that everybody is not immune to, and is immune to viruses that his body has never encountered.”