Ms. Mysnyk takes six pills a day, her virus level is undetectable and her immune system continues to be strong.

Slightly more schizophrenics are born during winter and spring, when virus levels are higher.

While plasma viral load tests are reliable, they have limitations: virus levels below a minimum concentration may not be detected.

But if your virus level is high, you are going in the wrong direction.

Dr. Boucher said it would also be medically unwise, since the drugs drive down virus levels, making transmission less likely.

At present, beaches are being designated as clean on bacteriological levels, with the virus levels being ignored.

Even though their virus levels may be low they can still spread the virus to others.

In most people, virus levels rise and then fall, beaten down mostly by a white blood cell called a killer T-cell.

In theory a person could have virus levels too low to detect, yet high enough to make a transplant recipient sick.

There is no cure for HIV, but treatment can keep virus levels low and help maintain your immune system.