Illustration of influenza virus amongst red blood cells in the bloodstream. There are three types of virus that all have a nearly identical morphology : Types A and B have two types of envelope glycoprotein or viral surface proteins (neuraminidase and haemagglutinin). Type C virus doesn't have surface neuraminidase. Flu usually causes lethargy,aching muscles,fever and nausea. Some strains,however,develop into far more serious forms,and epidemics in the past have killed millions | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Singh, Harvinder |
Bildgröße: | 4835 px × 3626 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |