Human immunodeficiency virus (HIV) can be prevented just by taking a daily pill, but a few numbers of individuals actually take it. A report of the Centers for Disease Control and Prevention (CDC) stated that more than one million people in the United States are at risk for HIV, but a daily pill of Truvada could prevent against the infection.

Some studies showed that men, who have sex with men, took pre-exposure prophylaxis (PrEP) and reduce their chances of contracting HIV by more than 90%. PrEP has been found reducing risk of HIV by over 70%, as per the studies.

Jonathan Mermin of the CDC said PrEP has been proven beneficial, but still, just 21,000 individuals are currently taking PrEP. No more than 1% people are availing the benefits, and it’s surprising, said Mermin.

The Food and Drug Administration (FDA) approved Truvada about three years ago, still over 30% primary care doctors do not know about PrEP, a nation survey revealed. J.D. Davids, managing editor of an online resource on HIV and AIDS, said there is a great change in HIV prevention, but it is still a secret in medical sector.

It is assumed that Charlie Sheen's recent HIV disclosure could aware people of the daily pill. The actor’s ex girlfriend, Amanda Bruce, said in a recent interview that she took the pill to prevent becoming infected with HIV.

Sheen said, “Medication reduced HIV levels to an undetectable level”. He accepted that he has not always used condoms, but his sexual partners were aware of his diagnosis.