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Airs Friday, August 5, 2011 at 9 p.m. on KPBS TV

It's been the HIV prevention message for decades: just practice safe sex. But there's evidence that message isn't getting over, especially with young gay men.

A Dozen More Veterans Put at Risk by Dirty Colonoscopies

Health officials say that moms participating in milk exchanges like those organized on Facebook are endangering their babies' health. But the moms say they're giving their children the healthiest possible start in life.

Vaccines have been wildly successful in taming killers like polio and measles, but some require boosters to stay effective. A few parents wonder if getting sick and gaining a natural immunity is better than giving their children vaccines.

Governor Arnold Schwarzenegger has approved an eight-year extension on a measure that allows local governments to decide whether pharmacies can sell syringes over-the-counter.

Lawmakers investigating drug safety heard for the first time Tuesday from family members of patients killed by the tainted blood-thinner Heparin. Meantime, the drug maker Baxter International said the contamination appeared to be deliberate.

Relatives of victims killed by contaminated heparin testify on Capitol Hill on Tuesday. The CEO of Baxter Inc., the company that manufactures the drug, says it appears that the contaminant was deliberately added to the heparin by a supplier in China.

Health officials say more widespread testing for HIV is one of the keys to curbing the epidemic. They say testing is also the gateway to proper care and treatment. Even so, many sexually active people don't know their status.

The FDA is working to identify a contaminant in batches of the popular blood-thinner, Heparin, which may be associated with 19 deaths. Heparin is used in dialysis and heart procedures to stave off blood clots. Anna Wilde Mathews, who covers the FDA for The Wall Street Journal, talks with Melissa Block.