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Pregnant women with COVID-19 face a significantly higher risk of death and of complications for themselves or their newborns, a new study finds.

The Baltimore factory contracted to make the COVID-19 vaccine was dirty, didn’t follow proper manufacturing procedures and had poorly trained staff, U.S. regulators said.

NASA’s experimental Mars helicopter rises from the dusty red surface into the planet’s thin air, achieving the first powered flight on another planet.

NASA’s experimental Mars helicopter rises from the dusty red surface into the planet’s thin air, achieving the first powered flight on another planet.

A CDC advisory panel is grappling with the best way to “do no harm” regarding Johnson & Johnson’s COVID-19 vaccine and its risk of blood clots.

Researchers are developing vaccines that could be taken as a capsule, a dissolvable tablet or a nasal spray. But the barriers to success are high.

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Yosemite National Park has reopened with limited capacity. Here are some photos of visitors’ return and a few shots of the time when animals reigned one year ago.

U.S. health advisors told the government that they need more evidence to decide whether a handful of unusual blood clots were linked to the shot — and if so, how big the potential risk is.

Reports of blood clots among those who got Johnson & Johnson’s COVID-19 vaccine may make some recipients anxious. Here’s how to handle those feelings.

Two COVID-19 vaccines have now been linked to a risk of developing blood clots. Scientists don’t know whether the vaccines are to blame.

The Centers for Disease Control and Prevention extended its eviction moratorium through the end of June. There were scientific reasons for doing so.

U.S. health officials say women seeking an abortion pill will not be required to visit a doctor’s office or clinic during the COVID-19 pandemic.

We explain what vaccine passports are, how they work, where they’ve been implemented, and why some people object to them.

Covid-19 Vaccines

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