The problem lies in the city’s outdated water infrastructure.
Plus, the latest on the U.S.’s homegrown COVID-19 variants and Google’s data tracking changes.
Recent studies showing that a single dose of vaccine could boost immunity for former COVID-19 patients.
NIAID Director Anthony Fauci sheds light on vaccines, variants, and a return to normalcy.
Why the CDC may update its guidance on masking, plus more science news stories from the week.