That is why we estimate that when the samples were taken there were more than a 1, 000 carriers in the south and the effect of the vaccine was most likely not strong enough at the time to reduce the number of carriers

مهمان عزیز شما حق دیدن لینک ها را ندارید برای استفاده از امکانات کامل انجمن عضو شوید

عضویت