Due to variants of the coronavirus, people likely will need a booster shot within a year to suppress the pool of those individuals susceptible to Covid-19, Pfizer Chief Executive Albert Bourla said Thursday.

A study by the University of Oxford found the risk of rare but sometimes-deadly blood clotting is roughly eight to 10 times greater in Covid-19 sufferers than among people who have received any of the first three Western-developed vaccines widely available.

The company and a partner will move forward with a separate study testing their oral antiviral drug in treating outpatients who are at high risk of complications.

The federal government’s recommendation to pause using Johnson & Johnson’s Covid-19 vaccine will remain in place after an advisory panel put off a vote on how to move forward following reports of a few cases of life-threatening blood clots.

Blood-clot concerns about Johnson & Johnson’s Covid-19 vaccine could complicate the U.S. mass vaccination campaign, deterring people who are hesitant and making room for misinformation to spread, health experts said.

The guidance regarding insurers’ required posting of healthcare prices came after The Wall Street Journal revealed hospitals used such codes on their price pages.

Scientists are racing to understand the cause of blood clots that affected six recipients of the company’s viral-vector vaccine and led authorities to recommend a pause in its use.

U.S. recommends the use of Johnson & Johnson’s Covid-19 vaccine be suspended while authorities investigate rare clotting cases.

A potential link between its Covid-19 vaccine and rare blood clots is the latest issue for one of the most storied names in healthcare.

Scientists say it isn't surprising that other side effects occurred as J&J’s Covid-19 vaccine was given to a much larger population than during trials.

Johnson & Johnson’s Covid-19 vaccine was authorized for use in the U.S. by federal health regulators. Here’s what we know and don’t know.

Pfizer, Moderna and Johnson & Johnson vaccines provide good protection against the virus that causes Covid. But how long does that last? Will you need a booster shot? Here’s what we know.

The Quantified Self Movement has gone beyond counting your steps to tracking everything from blood-oxygen levels to heart-rate variability.

The antibody drug reduced the risk of developing symptomatic Covid-19 infection by 81% compared with a placebo in people living with someone infected by the new coronavirus, a study found.

States are projected to get 700,000 doses, down from 4.9 million the week before.

Australia said it is reassessing its purchases of the company’s Covid-19 shot and its timeline for all residents to be vaccinated.

European health regulators have advised that there may be a link between the Covid-19 vaccine developed by AstraZeneca and the University of Oxford and very rare blood clots, and some governments have recommended restricting its distribution among younger people as a result.

The biotech startup behind the Covid-19 vaccine jointly developed by AstraZeneca and the University of Oxford plans as soon as this week to file publicly to sell shares in the U.S., according to people close to the company.

The contract drug manufacturer is expanding its production of Moderna’s Covid-19 shot, a development that could ensure the U.S. has ample supply as it ramps up vaccinations.

Shots are being halted in a small pediatric trial in the U.K. as the country’s drugs watchdog prepares to release more information about rare blood-clotting issues seen in adults.