Teen vaccination cut COVID-19 cases by 37% in California, new data show Researchers also estimated that 230,134 cases were averted in kids aged 5 to 11 years, a 24% reduction. CIDRAP

JAMA Network Open has published a new study showing that, from April 1, 2020, to February 27, 2023, in California, an estimated 146,210 COVID-19 cases were averted by vaccination in teens aged 12 to 15 years, representing a 37% reduction.

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Global immunization efforts have saved at least 154 million lives over the past 50 years A major landmark study reveals that global immunization efforts have saved an estimated 154 million lives – or the equivalent of 6 lives every minute of every year – over the past 50 years. The vast majority of lives saved – 101 million – were those of infants.

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US respiratory virus activity continues to tail off Wastewater COVID detections declined to the minimal level and are highest in the Midwest. CIDRAP

Respiratory virus activity from flu, COVID-19, and respiratory syncytial virus (RSV) continues to decline across most of the country, with only two jurisdictions—North Dakota and Wyoming—reporting high activity, the Centers for Disease Control and Prevention (CDC) said in updates today. ...

Hospitalizations continue to decline, but overall deaths were up slightly.

COVID-19 booster immunity lasts much longer than primary series alone, study shows

A new study coming out of York University's Centre for Disease Modelling in the Faculty of Science shows that immunity after a COVID-19 booster lasts much longer than the primary series alone. These findings are among other—sometimes "unintuitive"—revelations of how factors like age, sex and comorbidities do and don't affect immune response.

The work is published in the journal Scientific Reports.

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