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Massive amounts of H5N1 vaccine would be needed if there's a bird flu pandemic. Can we make enough? The first signs that H5N1 avian flu was starting to spread from person to person would trigger a race to produce massive amounts of vaccine. Helen Branswell STAT

There is no way to predict if the virus will acquire the capacity to spread between people, or when and under what conditions it would make that fateful leap if it does.

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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Only One Harm From mRNA COVID Vaccines, Report Determines Independent reviewers reject causal links to infertility, myocardial infarction, stroke Nicole Lou medpagetoday

Independent reviewers confirmed a causal relationship between the first mRNA COVID-19 vaccines and myocarditis, and also determined that, more broadly, intramuscular shots can cause a series of shoulder injuries.

Many healthcare workers unsure about COVID vaccine boosters for themselves, kids A survey of more than 4,100 healthcare personnel (HCP) at a New York healthcare system from 2021 to 2022 reveals that 17% were hesitant to receive the recommended COVID-19 vaccine booster, and 33% were unsure about vaccinating their children.  CIDRAP

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Many of the HCP polled held unsubstantiated beliefs not only about COVID vaccines but also childhood vaccines.

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