Pfizer Inc. PFE -0.36% said it plans to ask U.S. health regulators on Friday to permit use of its Covid-19 vaccine, a milepost in months of frantic efforts to find a medicine that could beat…

OK, concentrate: How much of your brain are you using right now—or at any moment in time? If you said 10%, you’ve repeated a popular, but inaccurate, myth. The origin of the tale is murky…

KABUL—Even before President Trump’s drawdown of U.S. troops in Afghanistan goes into effect, there are clear signs the national government is losing its grip. Streets empty out at dusk on the edge of the capital,…

MAIDUGURI, Nigeria—Traveling by road into Maiduguri, the capital of Nigeria’s northeast, has become one of the most dangerous journeys on earth. Vehicles entering the sprawling, sun-baked city pass under banners that welcome visitors to the…

Pfizer Inc. said it will ask health regulators to authorize its experimental Covid-19 vaccine within days, after reporting the shot was 95% effective in its pivotal study and showed signs of being safe. The company’s…

The once-grand Baldwin Hills Crenshaw Plaza mall in Los Angeles seemed like a prime target for investors. That was before it got caught up in a combustible debate over local ownership, race and economic development.…

An experimental Covid-19 vaccine from Pfizer Inc. and BioNTech SE BNTX -5.02% was 95% effective in final results from a pivotal study and is showing signs of being safe, key pieces of data as the…

MINNEAPOLIS—In the state where “defund the police” became a progressive rallying cry following the killing of George Floyd, the phrase is now being blamed for harming down-ballot Democrats both here and nationally after some suburban…

The strong early results for two leading Covid-19 vaccines have implications that go far beyond the current pandemic: They suggest the time has come for a gene-based technology that could provide new treatments for cancer,…

Moderna Inc. MRNA 9.58% said its experimental coronavirus vaccine was 94.5% effective at protecting people from Covid-19 in an early look at pivotal study results, the second vaccine to hit a key milestone in U.S.…

The pandemic is forcing many airlines to defend their turf. Southwest is using it to invade. Even as air travel languished in this fall, Southwest Airlines Co. executives fanned out to cities from Palm Springs,…

Where you live matters in terms of Alzheimer’s disease risk. Scientists and medical researchers know that advanced age and certain changes in the brain increase the chances of developing Alzheimer’s disease and related dementias. Now…

Moderna Inc. MRNA 1.80% said its experimental coronavirus vaccine was 94.5% effective at protecting people from Covid-19 in an early look at pivotal study results, the second vaccine to hit a key milestone. Of 95…

If you're planning on flying over the holidays, you probably know the drill: universal mask rules, buckets of hand sanitizer and, maybe, an empty adjacent seat. But your journey begins and ends at the airport.…

Hospitals across the nation face an even bigger capacity problem from the resurgent spread of Covid-19 than they did during the virus’s earlier surges this year, pandemic preparedness experts said, as the number of U.S.…

U.S. health officials on Monday authorized use of the first treatment for people with earlier-stage Covid-19 who aren’t hospitalized, filling a gap in treatment. The U.S. Food and Drug Administration said Eli Lilly LLY -0.29%…

A vaccine developed by Pfizer Inc. PFE 0.03% and partner BioNTech SE proved better than expected at protecting people from Covid-19 in a pivotal study, a milestone in the hunt for shots that can stop…

Restaurant chains are setting long-term plans to keep dining rooms open whenever and wherever possible as the coronavirus pandemic shows no sign of relenting. McDonald’s Corp. MCD 0.12% , Starbucks Corp. SBUX 0.03% and other…