Because the nucleic acid vaccine has the advantage that the normal regulations vaccine have no, but the nucleic acid vaccine also exists some problems that didn't resolve yet.
Because the nucleic acid vaccine has the advantage that the normal regulations vaccine have no, but the nucleic acid vaccine also exists some problems that didn't resolve yet.
由于核酸疫苗具有常规疫苗所没有的优点，但同时核酸疫苗也存在一些尚未解决的问题。