Like many autistic children, Julian Brown has trouble reading emotions in people's faces, one of the biggest challenges for people with the neurological disorder.

Now the 10-year-old San Jose boy is getting help from "autism glass" — an experimental device that records and analyzes faces in real time and alerts him to the emotions they're expressing.

Indian Prime Minister Narendra Modi called yoga a "people's mass movement" as he took to the mat Tuesday along with millions of others worldwide to celebrate the ancient practice.

Across India, sailors, soldiers, school children and bureaucrats bent and twisted their bodies from early morning at mass outdoor sessions to mark the second International Yoga Day.

DR Congo on Monday declared a yellow fever outbreak in the capital Kinshasa, home to more than ten million people, and in two other western provinces.

The U.N. on Friday said it fears a surge in polio cases among children who have escaped from the jihadist bastion of Fallujah, and has launched a "massive" vaccination campaign.

The Zika virus has been linked to birth defects in the fetuses and babies of six women in the United States who were infected while pregnant, U.S. health officials said Thursday.

Three of the women gave birth to infants with congenital defects such as microcephaly -- an abnormally small head -- and brain damage that are linked to Zika, the U.S. Centers for Disease Control and Prevention (CDC) said, citing figures as of June 9.

As they mourn friends and partners murdered in the gay nightclub massacre, homosexual men in Orlando are eager to join in the rush of solidarity by donating blood for those victims still clinging to life.

But they are angry and frustrated: federal law imposes strict conditions to guard against HIV transmission. Gay men can only give if they have not had sex with another man for a year.

A rapid HIV diagnostic kit for developing nations, designed by Cambridge University researcher Helen Lee, won the Popular Prize at the European Inventor Awards on Thursday.

Releasing genetically-modified mosquitoes into the wild to fight malaria, Zika or other insect-borne diseases is premature and could have unintended consequences, researchers said in a new report.

"Our committee urges caution -- a lot more research is needed to understand the scientific, ethical, regulatory and social consequences of releasing such organisms," said Arizona State University professor James Collins, who was co-chair of a National Academies of Sciences, Engineering and Medicine committee.

The latest Ebola outbreak in Liberia, the last country still affected by the deadliest flare-up in the history of the feared tropical virus, is to be declared over on Thursday.

Liberia will have passed the World Health Organization (WHO) threshold of 42 days -- twice the incubation period for the virus -- since the last known patient tested negative for the second time.

Thailand has become the first Asian country to eliminate mother-to-child transmission of HIV, the World Health Organization said Wednesday, a milestone in the fight against the disease.

The announcement is a boost for a generation of Thai health workers who have transformed the nation from one of Asia's most HIV-ravaged societies to a pin-up for how to effectively tackle the crisis.