![SA Health & Medicine Vol 4 Issue 4](https://static.scientificamerican.com/sciam/cache/file/53D37AC0-B640-409A-93E0A533BBB70022_source.jpg?w=300)
Volume 4, Issue 4
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Features
Chronic Covid: The Evolving Story
When SARS-CoV-2 lingers in the body, it accumulates many of the same mutations seen in the most dangerous global variants. What can scientists do with this knowledge?
We Need to Improve Indoor Air Quality: Here's How and Why
Upgrading buildings’ ventilation, filtration and other factors would not only decrease COVID transmission but also improve health and cognitive performance in general
What the Science on Gender-Affirming Care for Transgender Kids Really Shows
Laws that ban gender-affirming treatment ignore the wealth of research demonstrating its benefits for trans people’s health