While emergency use authorization gets vaccines out to the public more quickly, it doesn’t skip any steps that full approval requires.
Vaccines can’t provide 100% protection, so it’s not a failure or surprise when some vaccinated people get sick with COVID-19. The good news is their cases are much less likely to be severe or fatal.
As Los Angeles County again mandates masking indoors -- even for the fully vaccinated -- local health officials in the U.S. are closely eyeing their own COVID-19 vaccination and infection rates.
Ongoing tracking is meant to spot very rare risks – like the connection between the Johnson & Johnson shot and Guillain-Barré syndrome. And it relies on public reporting.
As many teens and adults in the US restart their social lives, parents of children under the age of 12 wonder when their kids will also be able to experience the freedom that comes with vaccination.
Though currently approved COVID-19 vaccines effectively provide immunity against the virus, it's unclear how long that protection will last.
Various companies use different ingredients and different delivery systems in their COVID-19 vaccines. Researchers are investigating whether it's better for individuals to mix what's available.
The Pfizer COVID-19 vaccine was recently approved for adolescents ages 12-15. Vaccination is essential to protect children from serious illness and quicken return to normal life.
The CDC and FDA said the benefits of the Johnson & Johnson vaccine far outweigh the low risk of developing rare blood clots and lifted a pause on the vaccine's use. A doctor explains.
It's normal for different people to mount stronger or weaker immune responses to a vaccine, but post-shot side effects won't tell you which you are.
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