Once U.S. stockpiles of COVID-19 vaccine run out, Moderna says it might charge as much as $130 per dose, but give people who lack health insurance a break. Critics say that's not enough help.
Immediately after the Food and Drug Administration authorized Pfizer's vaccine, the company delivered fewer doses than its government contract projected. Federal officials say they didn't know why.
The third COVID-19 vaccine authorized for use in the U.S. requires one shot instead of two, and works a slightly different way from the others. Here's what we know about its safety and effectiveness.
Pfizer's CEO sold $5.6 million worth of stock on Monday. The company says the stock sale was made as part of a preset plan. But NPR found irregularities about when the CEO entered into that plan.
Pfizer's COVID-19 vaccine is the first to have data showing that it exceeded the minimum effectiveness threshold set by the Food and Drug Administration for emergency use.
Several COVID-19 vaccine candidates are being tested now. But why does it take 30,000 volunteers to know if one is safe and effective? And what does it mean to say a vaccine candidate is working?
The Food and Drug Administration has approved a drug that thwarts some enzymes breast cancer cells use to evade treatment with estrogen-blocking drugs.