Influenza A viruses are negative sense, single-stranded, segmented RNA viruses.
The several subtypes are labeled according to an H number and an N number.
There are 18 different known H antigens (H1 to H18) and 11 different known N antigens (N1 to N11).
"Human influenza virus" usually refers to those subtypes that spread widely among humans.
H1N1, H1N2 and H3N2 are the only known influenza A virus subtypes currently circulating among humans.
- rapid onset of fever
- muscle aches
- running nose
- sore throat
- a cough.
Both the co driver and I have been laid low by this for nearly three weeks now.
Vaccinations against the virus are available but in many cases ineffective.
This disease is really one to avoid!