It’s cold and flu season and most of us will encounter a virus at some point. So, how does our immune system work to keep us healthy?
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“Whenever we have a second infection, these antibodies can be produced and thereby protect us but there are some limitations,” Gack said. “It only works if it’s the same virus or very similar virus.”Gack studies the immune system and said some viruses rarely mutate, which means we have long-term protection after an initial infection.
However, there are also viruses that mutate rapidly, like flu and COVID-19, making it difficult for your immune system to recognize the virus due to the mutations.If the vaccine is similar to the virus that’s circulating, your immune system recognizes it and offers some protection, resulting in milder illness. And the healthier you are, the better your immune system will function, in general.
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