On March 30, local time, WHO held a routine press conference on new coronary pneumonia. WHO Director-General Tedros Adhanom Ghebreyesus said that existing research shows that the most likely situation is that the new coronavirus will continue to evolve, but with the human body Immunity is enhanced by vaccination or infection with the virus, and the severity of the disease caused by the new coronavirus decreases over time.
But if a person's immunity weakens, there may be periodic peaks in the number of cases and deaths, in which case vulnerable groups need regular booster shots of the new crown vaccine.
The best-case scenario, Tedros said, is for less severe variants that don't require boosters or adjustments to vaccine components.
The worst-case scenario is the emergence of a more pathogenic and highly contagious variant, in which protection from previous vaccination or infection would rapidly diminish.
(Headquarters reporter Zhu He)