Task force says most people should not take daily aspirin to prevent a heart attack A medical task force is changing its guidance on the use of aspirin to prevent cardiovascular disease. It says older Americans without heart disease should not start taking daily low dose aspirin. Will Stone
FDA analysis of J&J COVID vaccine booster sets the stage for public hearing Johnson & Johnson has asked the Food and Drug Administration to authorize a booster for people 18 and older six months after initial immunization, with an option to vaccinate after two months. Scott Hensley
WHO launches a new group to study the origins of the coronavirus The World Health Organization advisory group will include scientists from the U.S., China and two dozen other countries and will study various hypotheses, including the possibility of a lab leak. Scott Neuman
A study of COVID vaccine boosters suggests Moderna or Pfizer works best Should people who get a COVID booster get a different vaccine from their original shot? The results of a highly anticipated study suggest that in some cases the answer may be yes. Rob Stein
Eating too much salt is making Americans sick. Even a 12% reduction can save lives The FDA has issued new targets to reduce the amount of salt that manufacturers put in their foods. It could prevent thousands of cases of cardiovascular disease. Allison Aubrey
The FDA authorizes e-cigarettes for the first time, citing benefits for smokers The FDA gave permission for the sale of a brand of e-cigarettes — saying the product can help adult quit smoking. At the same time, it rejected many flavored products which are popular with teens. Rachel Martin
United Airlines must delay its vaccine mandate for workers seeking an exemption A federal judge ordered United Airlines to temporarily halt its plan to remove unvaccinated employees seeking a religious or medical exemption from the company payroll. Jaclyn Diaz
FDA gives its 1st authorization for e-cigarettes The FDA has authorized the marketing of a line of e-cigarettes made by the R.J. Reynolds Vapor Company. The tobacco-flavored products can help adults quit smoking regular tobacco cigarettes. Allison Aubrey
Breakthrough infections might not be a big transmission risk. Here's the evidence Are vaccinated people who get COVID as likely to spread the infection as unvaccinated people? Scientists don't think so. Joe Palca
A Wisconsin brewery is helping parents sue school districts that don't require masks A school board "threw students into a COVID-19 'snake pit' " when it axed mask requirements and other measures, a federal lawsuit says. A Minocqua, Wis., brewery is helping fund parents' legal fight. Bill Chappell