Japanese researchers found that half a year after contracting the novel coronavirus, 98% of infected people still have antibodies in their bodies, and the more serious the disease, the stronger the antibodies.
Japanese media such as Japan Broadcasting Association Television and Kyodo News Agency reported on the 2nd that the research team of Yokohama City University in Japan targeted 376 people infected with the novel coronavirus and eventually recovered from February to May and analyzed their blood samples half a year after infection and found that 98% of people still had neutralizing antibodies in their bodies.
The subjects were between 20 and 70 years old, with 280 asymptomatic infections and mild patients, 71 moderate patients and 25 severe patients. Among asymptomatic infections and mild patients, 97% still have neutralizing antibodies; 100% of patients with moderate and severe cases still have neutralization antibodies. The study also found that the more severe the symptoms, the stronger the antibody, the less likely they were to be re-infected.
This is the first survey in Japan on neutralizing antibodies in hundreds of people in the first half year after infection. The research team intends to further analyze the antibody situation in the body one year after infection.