提供永久免费的API接口，查看更多API接口，如果您有其他免费API资源，请联系我们，造福人类。

定制开发，免费评估，免费咨询，价格便宜，售后保障，前往开发服务中心或联系开发客服中心

On December 10, the Capitol Hill reported that Pfizer CEO Albert bourla said on Wednesday that due to concerns about the Omicron variant, a fourth dose of new crown vaccine may eventually be needed < p > < / P > < p > bourla said that he previously thought that the fourth needle might need to be performed within 12 months after the third needle, but due to Omicron, this timeline might need to be advanced < p > the company said that the reinforcing needle seemed to provide good protection. Data released by Pfizer on Wednesday showed that the antibody level produced by the booster against the Omicron strain was similar to that of the two doses against the original virus < p > it is reported that, however, some experts are skeptical about the necessity of multiple vaccination. They pointed out that companies like Pfizer would have higher economic benefits by selling more vaccines. Two doses have been effective in preventing severe cases, especially for young people

2023-03-22 10:04:47