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The group of cellular and molecular processes that the body uses to fight bacterial, viral, and parasitic infections. Autoimmune and inflammatory disease are caused by malfunctioning of this system and should also be tagged with the disease name.

4 votes
1 answer
273 views

What would count as definitive proof that humans can develop COVID-19 immunity?

There are currently numerous debates over whether or not people who have recovered from COVID-19 develop immunity to the disease. By the standards of the the scientific community, what kind of proof w …
JonathanReez's user avatar
  • 1,496
3 votes
1 answer
47 views

Given that reinfection is possible with the flu viruses, why didn't the 1918 flu pandemic la...

We know that reinfection is possible with the seasonal flu and one could surmise that it was also possible with the 1918 flu strain. But if reinfection is possible and immunity to the flu doesn't last …
JonathanReez's user avatar
  • 1,496
6 votes
2 answers
162 views

Is there a virus from which humans can recover, but which doesn't grant long lasting immunity?

Prior to the SARS-CoV-2 epidemic I was under the impression that viruses fall into two categories: Diseases from which you recover and afterwards become fully immune. When reinfected with a mutated …
JonathanReez's user avatar
  • 1,496
3 votes
3 answers
84 views

Is it possible for humans to be resistant to certain viral infections without having specifi...

Popular understanding of how viruses work split immunity into four categories: Virus doesn't affect humans at all No immunity - will get worst possible infection, seems to be the case with COVID-19 …
JonathanReez's user avatar
  • 1,496