I read somewhere that going back in time would mean that we would infect the populace with the viruses and bacteria we harbour in our bodies. And we are also vaccinated against other diseases e.g smallpox using poxvirus.
if we were to travel to the past, would we infect the locals who wouldn’t be immune and basically recreate the plague?
Can the diseases we are currently vaccinated against infect others? why / why not?
Can the other bacteria/viruses that exist in our bodies cause a deadly outbreak? eg: flu / strep A
Additional scenario: What would happen if we set foot on Sentinel island? What organisms on/in our body would be fatal to them or people in the past ( say 1000 years ago ) ?
In: Biology
Going back in time would violate causality (that is, cause follows effect) and so there is no logic to what would happen if you did.
A normal, healthy person is unlikely to be currently a carrier for any serious diseases. Your body would not kill everyone if you went back in time/ met an uncontacted, isolated population with no shared immunity.
Maybe. Because you might be a carrier for many diseases that could easily spread and have devastating effects. Maybe you’ve got influenza, or syphilis or HIV or any number of other very dangerous diseases you could introduce to the local population.
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