COVID-19 updates: Classes in Chicago canceled for 4th day
Chicago Public Schools has been in talks with teachers over COVID-19 safety.
As the COVID-19 pandemic has swept the globe, more than 5.4 million people have died from the disease worldwide, including over 837,000 Americans, according to real-time data compiled by Johns Hopkins University's Center for Systems Science and Engineering.
About 62.5% of the population in the United States is fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
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Israel approves 4th vaccine dose for people 60 and over
Israel's Ministry of Health approved a fourth dose of COVID-19 vaccine for health care workers and people over 60 years old, Prime Minister Naftali Bennett said.
"Israel will once again be pioneering the global vaccination effort," Bennett said at a press conference in Jerusalem. "Omicron is not Delta -- it’s a different ball-game altogether."
Fourth doses will be administered four months after booster shots, Bennett said.
ABC News' Jordana Miller
Pfizer vaccine lowers risk of inflammatory condition in teens: CDC
The Pfizer-BioNTech COVID-19 vaccine dramatically reduces the risk of teenagers developing MIS-C, a dangerous inflammatory condition, according to a new study from the Centers for Disease Control and Prevention published Friday.
MIS-C is a condition in which different body parts can become inflamed such as the heart, lungs and kidneys. It tends to appear in kids and adolescents two to six weeks after becoming infected with COVID-19.
Researchers looked at children and teens between ages 12 and 18 from 24 hospitals across the country.
They found that the vaccine was 91% against MIS-C. Of the children who were critically ill with MIS-C and required life support, all were unvaccinated.
"No fully vaccinated patients with MIS-C required respiratory or cardiovascular life support, as opposed to 39% of unvaccinated MIS-C patients who did," the authors wrote.
-ABC News' Sony Salzman