Most people born before 1968 have antibodies against flu viruses similar to the H5N1 strain circulating today, which might lower their risk of severe illness
Most people born before 1968 have antibodies against flu viruses similar to the H5N1 strain circulating today, which might lower their risk of severe illness Most people born before 1968 have antibodies against flu viruses similar to the H5N1 strain circulating today, which might lower their risk of severe illness