A new pill taken daily is one of the new ways public health advocates are hoping to stem the number of people infected with HIV.

Public health officials joined us Friday for a live chat to discuss who is most at risk at contracting the virus, what cities are of concern and barriers to prevention. Experts also talked about what medicines are on the market that may help prevent people from getting the virus before or after being exposed to the virus.

The panel included Patrick Chaulk with the Baltimore City Health Department, Michael Kharfen of the D.C. Department of Health and Charles Jackson of the National Organization of Black County Officials.

Experts talked about the recent challenges to preventing the disease among seniors, how the rates among some heterosexual populations mirror those among some gay populations and the disparate impact of the virus among blacks.

Read more:

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The world's most effective HIV prevention drug hasn't lived up to its potential

No more excuses. We have the tools to end the HIV/AIDS pandemic.