America’s international travel rules still seem prejudiced against Europeans. The US reopened its borders on Nov. 8 to vaccinated foreign nationals from Europe, ending a ban that had dragged on far too long (more than 18 months) and looked increasingly arbitrary. No similar US blockade applied…

The US rollout of Covid-19 booster shots has been defined, unfortunately, by confusion. Last month, the Food and Drug Administration approved additional shots for many people who had received the Pfizer vaccine, but not for anyone who’d gotten Moderna or Johnson & Johnson. And in contrast to health…

Vaccine opponents are seizing on the death of former Secretary of State Colin Powell, who was fully vaccinated yet died of Covid-19 complications, to cast doubt on the vaccination effort against the virus. As usual, these people are dangerously wrong. The death of someone like Powell, who was 84…

Merck & Co. and Ridgeback’s antiviral pill molnupiravir is a potential pandemic game-changer, judging from the positive test data that arrived Friday. To make the most of this promise, governments and global health organizations need to prepare to manufacture the pills in great quantities. The…

The race to tame Covid-19 has resulted in a wealth of research, new vaccines and promising treatments that hold out the promise of an end to the pandemic. But many questions remain. Here, Max Nisen and Sam Fazeli, who cover health care and the pharmaceutical industry for Bloomberg Opinion and…

Now that the top US health regulators have delivered their verdict on Covid-19 booster shots, who exactly is in line to get one in the coming weeks? Sadly, too many of the wrong people and too few of the right ones, adding more messiness to a rollout process that’s been far from smooth. The…

Delta Air Lines Inc. announced Wednesday that it would impose a $200 monthly surcharge on employees who aren’t inoculated against Covid-19, pioneering an alternative to the vaccine mandates issued by other corporations as they seek to limit the spread of the highly contagious delta variant while…

With the delta variant surging throughout the US, Biden administration chief medical adviser Anthony Fauci has advocated for more testing — including for the vaccinated. More testing is essential, but how we test is important, too. The US is testing fewer people than it did in previous Covid…

Sanofi is one of the world's largest vaccine makers, with billions in reliable annual sales coming from the business. With its $3.2 billion purchase of Translate Bio Inc., announced Tuesday, the company is coopting a possible disruptor. Translate focuses on messenger RNA, the promising new…

A drug that can help obese people safely cut an average of 15% of their body weight sounds like a miracle for those who can’t keep pounds off with diet and exercise alone. Wegovy, a Novo Nordisk A/S drug that the Food and Drug Administration approved in early June, appears to do exactly that. It…