Nancy Messonnier, a top Centers for Disease Control and Prevention official, has resigned her post. The first U.S. official to warn about the COVID-19 pandemic last year, Messonnier resigned after she was reassigned from her position on the agency’s COVID-19 vaccine task force. (POLITICO)

As part of a plan to expand its virtual healthcare offering, Walmart has bought telehealth company MeMD. The announcement comes in the wake of Amazon’s own telehealth expansion. (The Wall Street Journal)

Biotech companies Nkarta and CRISPR Therapeutics will partner to combine two immune-cell approaches to treat cancer. The partnership will attempt to merge treatments that employ T cells and “natural killer” ones.  (STAT)

The European Medicines Agency safety committee said it is aware of heart inflammation cases reported following administration of the Pfizer vaccine. The Pandemic Response Accountability Committee asked Pfizer to provide more data on the cases. (Endpoints News)

As employees return to offices, mental health care providers are urging employers to prepare for the fallout from COVID-19. Data from the American Psychological Association show issues like weight gain or loss, sleep disruptions and low physical activity have increased during the pandemic. (Bloomberg)