Republican governors of Florida and Texas battle with cruise lines over vaccine requirements

The Republican governors of Florida and Texas are headed toward showdowns with some of the world’s largest cruise lines, including Norwegian and Carnival, over whether passengers boarding ships leaving their states can be required to show proof they’ve been vaccinated.

A link between Covid-19 vaccination and a cardiac illness may be getting clearer

Vaccine advisers to the US Centers for Disease Control and Prevention say there has been a higher-than-expected number of cases of a heart ailment among young people, most often males, who’ve recently received their second doses of the Pfizer and Moderna Covid-19 vaccines. The CDC says the reports of the ailment are “rare” and that …

FDA’s vaccine advisers to discuss rules for authorizing Covid-19 shots for kids

Vaccine advisers to the US Food and Drug Administration will meet Thursday to discuss what information the agency should ask for in considering the go-ahead for vaccinating children under 12 — including how many children need to be enrolled in clinical trials and how much safety data will be needed.