It's essentially impossible to go through life without getting an infection. We've come to expect and accept the fact that we'll probably get one at least once a year when the upper-respiratory virus ...

Most influenza viruses enter human or animal cells through specific pathways on the cells' surface. Researchers have now discovered that certain human flu viruses and avian flu viruses can also use a ...

It can be difficult to distinguish between a cold and a sinus infection, since they may share symptoms. But doctors explain ...