All types of preventive medicine offer benefits and risks, and vaccines are no exception. But often, the risks related to getting a disease may be greater than the risks of the vaccine.

People with HIV have weakened immune systems, so they are more likely to catch harmful diseases like tuberculosis. However, new research suggests that a certain prevention therapy could significantly reduce that risk.

Although tuberculosis (TB) is a preventable and curable disease, it still causes death and illness, especially in developing countries. And even developed countries are not out of the danger zone, particularly as immigration and travel help spread the disease. 

Most people get the flu vaccine for the obvious reason: to protect them from the flu. But there may be other benefits to the shot as well.

Ohio is in the midst of an outbreak of Legionnaire's disease, a serious illness caused by the bacteria Legionella .

When H7N9, a strain of bird flu, began infecting people in China last spring, officials and scientists worldwide tried to quickly learn more about this new virus.

Vaccines protect people from diseases. Pregnant women who get vaccinated can pass on that protection to their developing babies. And it seems some of that protection may last even after birth.

The goal of developing new vaccines is to decrease the cases of certain illnesses. The vaccine for pneumonia appears to have done just that.

The number of children diagnosed with Type 1 diabetes has been rising. Sometimes, the disease is inherited. But sometimes, factors other than genes are involved in causing diabetes.

Each year a new flu vaccine is created to try to match up with the strains of flu that are going around. What happens if the flu vaccine isn't a perfect match for the strain of virus it's fighting?