5. The relationship between antibody levels and COVID-19 reinfection?
Many studies have shown that vaccination or immunization from natural infections can reduce the probability of COVID-19 reinfection. People with low immunity or low antibody levels are relatively more vulnerable to reinfection.
Infographic:
A look at China's economy in Jan-Feb, 2026
Infographic:
China to expand two-way investment cooperation
Infographic:
China to open wider to outside world