But the coronavirus causes COVID, while the influenzavirus causes the ... while the H9 subtype is less dangerous. Bird flu, particularly flu subtypes H5N1 and H7N9, can sometimes spread to ...
A subtype of bird flu caused by avian influenza A (H5) virus has been spreading worldwide ... including avian influenza A(H5N1), have gained the ability to spread easily and sustainably ...
The findings come at a time when outbreaks of bird flu -- a different subtype of the ... of the highly pathogenic avian influenza (HPAI) H5N1influenzavirus currently circulating ...