![]() Some viruses also have a lipid envelope that is similar to the barrier that surrounds our cells. The most basic parts of a virus are genetic material (DNA or RNA), a few proteins that will help the virus to replicate in a cell, and a protective protein shell. HIV, bird flu, SARS, and COVID-19 are examples of this. But very rarely, a virus can mutate in a way that allows it to cross from one kind of host to another. So, a virus that makes your cat sick isn’t likely to make you sick. One kind of virus usually only infects one kind of host. Plants, animals, fungi, and even bacteria can be infected by viruses. ![]() There are many kinds of viruses, and viruses infect every form of life on earth. Colorized image by José R Valverde from Pixabay. This makes them very different from enveloped viruses, like the flu. ![]() ![]() Viruses like the rhinovirus shown here (which causes the common cold) don't have a fatty envelope.
0 Comments
Leave a Reply. |