Aug 16, 2020 10:01
Some diseases, like the measles, infect us once and usually grant us immunity for life. For others, like the flu, we have to get vaccinated year after year. So why do we develop lifelong immunity to some diseases but not others? And where does the novel coronavirus fit into all this? Whether or not we develop immunity to a disease often depends on our antibodies, which are proteins we produce in response to infection.