Jay Inslee, the governor of Washington state, has said climate change is the “driving motivation” for his presidential campaign; some of his opponents agree, particularly after an April CNN/SSRS poll found that 82 percent of Democrats and Democratic-leaning voters described the issue as “very important.” One of these candidates will face off in the general election against a president who ran on the assurance that “I believe in clean air. Immaculate air.

In high-income countries like the U.S., the standard of care for people infected by HIV is to provide antiretroviral pills when the virus is found, even when there are no symptoms of AIDS. The strategy staves off the disease and has a second – big – benefit. It's been shown to prevent the spread of HIV in sexual encounters. It's called "treatment as prevention" (TasP in medical jargon), or "test and treat."

But in low-income countries, "test and treat" is not the typical approach to prevention. There's been no research to support it.

By Donald G. McNeil Jr., The New York Times

The hormone shot — popular among African women who must use birth control in secret — is as safe as other methods, scientists reported.

For decades, many African women in need of birth control they could use in secret have relied on intramuscular hormone injections that prevent pregnancy for three months.

by Oliver Milman, The Guardian

Deaths are predicted for any year that was the warmest for 30 years, a dire scenario that would be avoided if the world stuck to Paris climate agreement

Thousands of heat-related deaths in major US cities could be avoided if rising global temperatures are curbed, new research has found.