Can we be infected twice by COVID-19?

The findings are not published in any medical journal. Scientists said that the male sex person, 33, had slight symptoms the first time and no symptoms the second time, suggesting that his immune system may have provided a kind of protection against dangerous illness even though it could not prevent infection again. Its second-time infection by the Coronavirus was discovered through testing at Hong Kong Airport. Meanwhile, several other possible cases of infection have been reported for the second time, including an American citizen who became more serious than the first time.

Even if humans can again be affected by the coronary, the World Health Organization says that the odds are that this will not happen regularly. Public health experts say that in general they believe that people who once experienced the disease can gain immunity to a new coronary infection. But they do not know how much protection this can provide and how long it can last.

Experts add that this requires attention because if immunity loses effectiveness, it could pose a challenge to vaccines. Some experts say strengthening vaccines would be needed in this case. It is also unclear whether those who have been infected could spread the virus to others. That is another reason why scientists say that people must continue wearing masks, physical distance, and hygiene.