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A growing body of preliminary research suggests most Covid vaccines offer almost no defense against infection from the highly contagious Omicron variant. The only vaccines that appear to be effective against infections are those made by Pfizer and Moderna, reinforced by a booster, which are not widely available around the world. |
Other vaccines — including those from AstraZeneca, Johnson & Johnson and vaccines manufactured in China and Russia — do little to nothing to stop the spread of Omicron, early research shows. Because most countries have built their inoculation programs around these vaccines, the gap could have a profound impact on the course of the pandemic. |
Still, most vaccines used worldwide do seem to offer significant protection against severe illness. And early Omicron data suggests South Africa’s hospitalizations are significantly lower in this wave. |
U.S.: A fourth wave has arrived, just days before Christmas. More than 125,000 Americans are testing positive every day, and hospitalizations have increased nearly 20 percent in two weeks. Only one in six Americans has received a booster shot. |
Here are the latest updates and maps of the pandemic. |
In other developments: |
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