Spikes of flu virus in wastewater raise questions about spread of bird flu | CNN Spikes of influenza A virus seen in wastewater samples from 59 sewer systems across 18 different states this spring may point to the spread of the H5N1 avian influenza virus that is currently infecting dairy cattle, a new study suggests. Brenda Goodman CNN

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So far, the US Department of Agriculture has reported more than 30 herds of dairy cows infected with H5N1 influenza across nine states. But there are questions about how large the outbreak might be and whether the US can adequately track it.

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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.

Testing environmental water to monitor COVID-19 spread in unsheltered encampments

To better understand COVID-19's spread during the pandemic, public health officials have expanded wastewater surveillance. These efforts track SARS-CoV-2 levels and health risks among most people, but they miss people who live without shelter, a population particularly vulnerable to severe infection.

To fill this information gap, researchers reporting in Environmental Science & Technology Letters tested flood-control waterways near unsheltered encampments, finding similar transmission patterns as in the broader community and identifying previously unseen viral mutations.

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