North & Central America

This archive covers progress stories from North and Central America, spanning the U.S., Canada, Mexico, and the countries of Central America. The 1,760 articles here track milestones in areas such as public health, conservation, policy, and community-led initiatives across the region. Browse to find reported evidence of what is working and why.

Viruses up close

Scientists eliminate HIV in animal genome in historic first

Existing HIV treatment used antiretroviral therapy, which is not a cure for HIV and requires lifelong use. In this study, researchers used a gene editing system to remove large fragments of HIV DNA from infected cells, along with a new drug regimen called long-acting slow-effective release. This approach eliminated HIV DNA from about one-third of the mice, marking the first time that HIV had been eradicated from the genomes of living animals.