![]() Again, this is what happens with other respiratory pathogens.Īnd it’s why some researchers actually looked at the Hong Kong case with relief. Researchers have then hypothesized that with SARS-CoV-2, perhaps our immune systems might not always be able to prevent it from getting a toehold in our cells - to halt infection entirely - but that it could still put up enough of a fight to guard us from getting really sick. With other viruses, protective immunity doesn’t just vanish one day. Why do experts expect second cases to be milder? (These are called the “ correlates of protection.”)įear, dread, and panic: Some Covid-19 survivors feel stalked by possibility of reinfection They also don’t know exactly what mechanisms provide protection against Covid-19, nor do they know what levels of antibodies or T cells are required to signal that someone is protected through a blood test. With other coronaviruses, protection is thought to last for perhaps a little less than a year to about three years.īut researchers can’t tell how long immunity will last with a new pathogen (like SARS-CoV-2) until people start getting reinfected. It’s thought, then, that people who recover from Covid-19 will typically be protected from another case for some amount of time. In addition to fending off the virus the first time, that immune response also creates memories of the virus, should it try to invade a second time. This is what happens after other viral infections. Researchers are finding that, generally, people who get Covid-19 develop a healthy immune response replete with both antibodies (molecules that can block pathogens from infecting cells) and T cells (which help wipe out the virus). What happens when we get Covid-19 in the first case? If you value our coronavirus coverage, please consider making a one-time contribution to support our journalism. Exclusive analysis of biotech, pharma, and the life sciences Learn More ![]()
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