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How El Nino is expected to cause more weather extremes in the U.S.

As hot as the Earth's weather has been in recent years, it's about to get hotter: El Niño is on the way, with warmer sea temperatures promising new weather extremes, U.S. and international forecasters say.

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Overview of how the end of the national Covid emergency will affect Americans

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As this long emergency period expires, experts say, the biggest impact for consumers will be the end of free coronavirus tests — both at-home tests and those performed by clinicians and analyzed by commercial labs — with broad implications for people’s ability to get timely covid diagnoses, prevent disease transmission and track the virus.

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Bivalent COVID vaccine shows good Omicron protection while older version wanes --studies

Two studies published today measure the vaccine effectiveness (VE) of COVID-19 vaccines against laboratory-confirmed Omicron variant and subvariants and symptomatic disease. Vaccines that target the newer variants performed well, but primary vaccines offered rapidly waning protection from SARS-CoV-2 infections in the post-Omicron era.

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