Viruses

Cancer may be related to viruses of some kind.

Viruses will exist as long as man.

Throat and nose membranes hurt by dry air allow cold viruses to enter more easily. It is important to carry out sensible counter plans against the cold with heaters and against the dryness with humidifiers.

I think computer viruses should count as life.

Infectious diseases are caused by prions, viruses, rickettsia, chlamydia, bacteria, pathogenic fungi and protozoa.

Antibodies fight off infections and viruses.

Under a microscope, some viruses appear quite beautiful.

Viruses are much smaller than bacteria.

Many people don't realize that antibiotics are ineffective against viruses.

I've found a lot of viruses on my aunt's computer.