MONDAY, July 19 (HealthDay News) -- Outdoor summer fun can sometimes lead to falls and injuries in children, so parents would be wise to get informed about the use of medical imaging tests before an emergency occurs that requires X-rays or CT scans, an expert says.

SUNDAY, July 18 (HealthDay News) -- Now that the Major League Baseball All-Star break has passed, the number of player injuries should slow down for the remainder of the season, new research suggests.

(HealthDay News) -- Driving at night can be more challenging and more dangerous, especially if you have impaired vision.

(HealthDay News) -- The sclera, or white area of the eye, appears red when blood vessels swell.

MONDAY, July 19 (HealthDay News) -- Exposure to cigarette smoke can undermine the immune system and raise the risk for cancer, cell death and metabolic problems by harming gene expression, new research reveals.

SUNDAY, July 18 (HealthDay News) - Effective and widespread treatment of HIV disease may also help cut the rate of new infections, researchers report.

SUNDAY, July 18 (HealthDay News) -- Starting antiretroviral treatment (ART) when an HIV patient has no symptoms can prevent the progressive immune system destruction that leads to AIDS, according to new treatment guidelines released by the International AIDS Society-USA Panel.

SUNDAY, July 18 (HealthDay News) -- Wouldn't it be nice if you could get the flu vaccine through a stick-on skin patch instead of a shot?

MONDAY, July 19 (HealthDay News) -- Point-of-sale tobacco advertising is a major cause of teen smoking in the United States and should be banned, Stanford University Medical School researchers say.

MONDAY, July 19 (HealthDay News) -- People who are obese at age 18 are at increased risk of developing psoriatic arthritis, a new study suggests.

MONDAY, July 19 (HealthDay News) -- A small study suggests that the illicit "club drug" Ecstasy may have one positive use: making psychotherapy more effective for people with post-traumatic stress disorder (PTSD).

SUNDAY, July 18 (HealthDay News) -- Almost half of HIV-negative people who participate in clinical trials for HIV vaccines end up testing positive on routine HIV tests -- even though they're not actually infected, a new study shows.

MONDAY, July 19 (HealthDay News) -- Children conceived using in vitro fertilization have a higher risk of developing cancer than do children who were conceived naturally, new research shows.

MONDAY, July 19 (HealthDay News) -- An analysis of soundtracks from a recording system worn by young children might detect differences in vocalization and help researchers identify those children who may have autism or language delays, a new study suggests.

MONDAY, July 19 (HealthDay News) -- A new technique could give women a better idea of whether they're likely to become pregnant in a second attempt at in-vitro fertilization (IVF) after failing a first time.

MONDAY, July 19 (HealthDay News) -- People in an Alabama city who had higher levels of the chemicals known as PCBs in their bodies were much more likely to have high blood pressure, a recent study found, but it's not clear if the PCBs actually caused their hypertension.

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

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

MONDAY, July 19 (HealthDay News) -- Reusing an injured patients' own blood during emergency surgery costs less and avoids the risks associated with using donated blood for transfusions, new research suggests.

MONDAY, July 19 (HealthDay News) -- Only about half of young adults in the United States undergo cholesterol screening, even though up to one-quarter of them have elevated levels of "bad" cholesterol, a new study has found.

MONDAY, July 19 (HealthDay News) -- Regular cell phone use may increase the risk of developing persistent ringing in the ear -- a condition known as tinnitus, a small Austrian study suggests.

MONDAY, July 19 (HealthDay News) -- In the poorer neighborhoods of America's cities, about 1 in every 50 heterosexual adults are now infected with HIV -- a much higher rate than is seen in the general population, U.S. health officials report.

MONDAY, July 19 (HealthDay News) -- A vaginal gel applied consistently before and after sex reduced the risk of HIV infection by more than half, according to a study presented Monday at the International AIDS Conference in Vienna.