Air in U.S. Cities Getting Cleaner, EPA Says

THURSDAY, Aug. 21, 2014 (HealthDay News) -- The air in American cities is getting safer to breathe, the U.S. Environmental Protection Agency reported Thursday.

Two Polio Vaccines May Give Greater Protection Against Crippling Disease

THURSDAY, Aug. 21, 2014 (HealthDay News) -- Using two types of polio vaccines seems to provide stronger protection against the disease and may boost efforts to eradicate polio, a new study shows.

New Drug May Fight Serious Respiratory Virus in Infants

THURSDAY, Aug. 21, 2014 (HealthDay News) -- An experimental drug shows promise in treating respiratory syncytial virus (RSV), a leading cause of pneumonia in infants, researchers report.

New Test Helps Diagnose Type 1 Diabetes

THURSDAY, Aug. 21, 2014 (HealthDay News) -- The U.S. Food and Drug Administration has approved a new test that may help doctors diagnose type 1 diabetes, the most common form diagnosed in children and adolescents.

Consumer Reports Advises Pregnant Women to Avoid Tuna

THURSDAY, Aug. 21, 2014 (HealthDay News) -- In a new review of seafood safety, Consumer Reports is advising that pregnant women avoid eating tuna due to concerns about mercury exposure.

Both U.S. Health-Care Workers Infected With Ebola Released From Hospital

THURSDAY, Aug. 21, 2014 (HealthDay News) -- The two American health-care workers infected with the deadly Ebola virus while doing missionary medical work in West Africa have been released from the Atlanta hospital where they have been slowly recovering for several weeks, officials said Thursday.

Health Highlights: Aug. 21, 2014

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

Health Tip: Help Keep Teen Drivers Safe

(HealthDay News) -- Inexperienced teen drivers, facing a host of potential distractions, are more likely than older people to be involved in an accident.

Study Ties Colds, Flu to Rare Risk of Stroke in Kids

WEDNESDAY, Aug. 20, 2014 (HealthDay News) -- Although it's extremely rare, colds, flu and other minor infections might trigger a strong but brief period of elevated risk for stroke in children, a new study suggests.

Exercise May Guard Against Irregular Heartbeat in Older Women

WEDNESDAY, Aug. 20, 2014 (HealthDay News) -- Regular exercise may help older women avoid a condition that causes a life-threatening irregular heartbeat, a new study shows.