Record Heat, Drought May Explain Zika Outbreak in Brazil: Research

FRIDAY, Feb. 5, 2016 (HealthDay News) -- There may be a link between the recent hot and dry winter and spring in Brazil and the outbreak of the Zika virus, preliminary research suggests.

Wildfires May Boost Ozone Levels in Cities: Study

FRIDAY, Feb. 5, 2016 (HealthDay News) -- Wildfire smoke may boost levels of dangerous ozone air pollution, researchers report.

CDC Adds New Zika Warning for Pregnant Women and Their Sex Partners

FRIDAY, Feb. 5, 2016 (HealthDay News) -- Pregnant women with a male sexual partner who has traveled to, or lives in, an area affected by active Zika virus transmission should refrain from sex or use condoms during sex until the pregnancy is over, the U.S. Centers for Disease Control and Prevention advised on Thursday.

Super Bowl Foods Can Be a Win, Win: Healthy and Delicious

FRIDAY, Feb. 5, 2016 (HealthDay News) -- Super Bowl Sunday is as much about eating as it is about whether the Panthers or the Broncos score the first touchdown.

Waning Whooping Cough Immunity Blamed in Outbreaks

FRIDAY, Feb. 5, 2016 (HealthDay News) -- The booster shot given to pre-teens to ward off whooping cough only works for a short time -- a fact that has played a big role in recent outbreaks in California, a new study finds.

NFL Linemen Keep Growing, Putting Their Health at Risk, Experts Say

FRIDAY, Feb. 5, 2016 (HealthDay News) -- As the Denver Broncos and Carolina Panthers gear up for Sunday's Super Bowl 50 showdown, many may be focused on the potential dangers of concussion, but that's not the only health risk football players face.

Health Highlights: Feb. 5, 2016

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

Health Tip: Chickenpox Can Be Dangerous

(HealthDay News) -- Chickenpox is notoriously contagious, and for some people it can be very dangerous. Women who are pregnant, young children, the elderly and people with a weakened immune system are at greatest risk of complications.

Daily Bit of Chocolate in Pregnancy May Help Mom, Baby

THURSDAY, Feb. 4, 2016 (HealthDay News) -- Pregnant women who nibble just a small piece of chocolate each day may improve the circulatory health of their unborn child, a new study suggests.

Too Much, Too Little Sleep During Pregnancy May Prompt Weight Gain

THURSDAY, Feb. 4, 2016 (HealthDay News) -- Sleeping too few or too many hours a night may lead to excessive weight gain during pregnancy, a new study suggests.