VIRAL INFECTION

What Is a Viral Infection? A viral infection is a proliferation of a harmful virus inside the body. Viruses cannot reproduce without the assistance of a host. Viruses infect a host by introducing their genetic material into the cells and hijacking the cell's internal machinery to make more virus particles. With an active viral infection, a virus makes copies of itself...

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FLU

Flu is a common infectious viral illness spread by coughs and sneezes. It can be very unpleasant, but you'll usually begin to feel better within about a week. You can catch flu – short for influenza – all year round, but it's especially common in winter, which is why it's also known as "seasonal flu". It's not the same as the common cold. Flu is caused by a different group of viruses and the symptoms tend to start...

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ANTIBIOTICS

This article is about treatment of bacterial infection. For antitumor antibiotics, see Chemotherapy § Cytotoxic antibiotics. Testing the susceptibility of Staphylococcus aureus to antibiotics by the Kirby-Bauer disk diffusion method – antibiotics diffuse from antibiotic-containing disks and inhibit growth of S. aureus, resulting in...

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