of COVID-19 is what role immunity plays. In particular, we are trying to understand how the immune system responds to SARS-CoV-2 and whether, once cured, one becomes immune to the infection or runs the risk of contracting the virus a second time.
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To date, it is known that those who fall ill with COVID-19 develop an antibody response in the period between 10 and 21 days after infection; in the vast majority, it seems that these antibodies are neutralizing, that is, able to repel further attacks by of the virus, as it happens for other infectious diseases. It remains to define how long the immunity they confer.
Understanding how long immune responses are effective in protecting against reinfection are the key questions for predicting the course of the health emergency.
