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Tomatoes first get the blame for the largest salmonella outbreak in over a decade, sickening more than 1,400 people in 43 states, including New York. But the source winds up being contaminated jalapeno serrano peppers exported from Mexico to the United States.

Questions were raised about the effectiveness of cholesterol-lowering drug, Vytorin. A study of the popular combination pill shows while it did lower bad cholesterol, it did little more than one of its components, Zocor alone, to keep plaque from clogging up the arteries.

A Centers for Disease Control report found the childhood obesity rate may be leveling off. Just over 16 percent of children were considered obese in 2005 and 2006, nearly the same as in 2003 and 2004.

That does not mean the nation's youth are not at risk. With obesity rates still high, the American Academy of Pediatrics makes a controversial move -- calling for cholesterol screening for kids as young as two and encouraging use of cholesterol-lowering drugs in kids as young as eight who have too much bad cholesterol along with other risk factors.

The Food and Drug Administration made another move to protect the nation's children, issuing a strong warning to parents not to give over-the-counter cough and cold medicines to children under age two because of serious safety concerns. Drug makers agreed and took the issue a step further; voluntarily warning their products should not be given to children under four.

With an average of 20,000 children under the age of five hospitalized or killed because of influenza complications each year, the CDC recommended all children from six months up to their 19th birthday get an annual flu shot.

This year was filled with ongoing concerns about Bisphenol-A, or BPA. The latest research published in the Journal of the American Medical Association said exposure to the chemical found in most plastics may increase risk of heart disease, Type-2 diabetes, and liver problems over many years of exposure.

The plastics industry says levels of BPA in their products are too low to cause harm. The FDA initially agrees, but now they are taking a second hard look.

Hands-on is better than hands-off. The American Heart Association encourages a "hands-only" approach to CPR when an adult collapses from cardiac arrest, until help arrives. And to keep the heart from skipping one more beat, a study suggests performing compressions to the tune of "Stayin' Alive."

And more people are infected with HIV than previously thought. A new CDC study released in 2008 showed there may be more than 55,000 new HIV infections a year in the United States, more than 40-percent higher than previous estimates. Researchers hope the more accurate number will serve as a wake up call to those charged with funding research, prevention and education.