Hong Kong study has already concluded that 3 doses of inactivated vaccines have similar effectiveness against covid compare with mRNA. Any extra vaccines or mix and match don't add that much benefits. A boost shot would give a few months extra protection but otherwise boost shots don't offer much benefits.
It is likely that the Chinese government would offer a boost shot soon but in the end of the day a boost shot would only offer help in short term. As I said before, the Chinese government wouldn't reopen until late Spring or early Summer due to the fact that the virus would spread more rapidly during the winter months.
It is likely that the Chinese government would offer a boost shot soon but in the end of the day a boost shot would only offer help in short term. As I said before, the Chinese government wouldn't reopen until late Spring or early Summer due to the fact that the virus would spread more rapidly during the winter months.