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Vaccines

What to Know About Monkeypox

Medical and public health officials are concerned—and puzzled—by the increasing number of confirmed monkeypox cases in countries outside central and western Africa, where the virus is endemic. In the past 5 years, scientists have confirmed only 8 cases where travelers carried monkeypox to countries outside Africa, including 2 cases last year in […]

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COVID-19 Reinfections 

Practice Essentials The definition of COVID-19 reinfection has evolved since early 2021. Fundamentally, it describes an infected individual who has been fully vaccinated, with or without a booster or boosters, and becomes infected with COVID-19 again. The CDC more precisely defines it as COVID-19 infection of a given person with […]

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Unexplained Acute Pediatric Hepatitis Cases Worldwide

The CDC is investigating 180 reports of unexplained acute hepatitis among pediatric patients in 36 states and territories, including 5 deaths, over the past 7 months, the agency announced on May 18. Nine percent of the patients required liver transplants. About 340 additional cases have been reported worldwide, according to a May […]

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North Korea Reports Outbreak of Another Infectious Disease

North Korean officials have reported a major outbreak of another infectious disease, which is affecting at least 800 families so far. Medical crews and disease investigators were sent to Haeju City in South Hwanghae province for an “acute enteric epidemic,” which refers to a digestive illness. South Korean officials have […]

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FDA: Moderna Vaccine Safe for Kids 6 Months to 17 Years

U.S. Food and Drug Administration advisers say Moderna’s COVID-19 vaccine is safe and effective for children aged 6 months to 17 years, according to an FDA document made public on Friday. Two doses of the Moderna vaccine caused an immune response in clinical trial participants that was similar to the immune response […]

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Cardiac Complications More Common After COVID-19 Than Vaccination

The risk of developing myocarditis and other inflammatory heart conditions after COVID-19 vaccination is substantially lower than it is after SARS-CoV-2 infection, according to an analysis of electronic health records from 40 US health systems. Although it’s a rare complication, myocarditis has been associated with both SARS-CoV-2 infection and messenger RNA (mRNA)–based […]

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“Battle Of Omicron” Being Won By New BA.4 And BA.5 Variants As Overlapping Covid Waves Hit U.S.

Estimates released by the Centers for Disease Control and Prevention today indicate that the share of cases tied to Omicron variants BA.4 and BA.5 increased 79% in the past week. That means, even as the more transmissible BA.2.12.1 Omicron subvariant became officially dominant in the U.S. last week, it’s already being pushed out by newcomers BA.4 and BA.5. The […]

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COVID-19 Cases, Hospitalizations, and Deaths Among American Indian or Alaska Native Persons — Alaska, 2020–2021

Summary What is already known about this topic? American Indian or Alaska Native (AI/AN) persons across the United States face substantial health disparities, including a disproportionate incidence of COVID-19 illness. What is added by this report? AI/AN persons living in Alaska are at increased risk for COVID-19 illness, COVID-19–associated hospitalization, […]

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