Pot use seems to contribute to more severe cases of COVID-19, study finds - UPI.com Among patients diagnosed with COVID-19, those who used marijuana had a higher risk of hospitalization and intensive care unit admission, a new study indicates. UPI

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Study Confirms One Type of COVID Mask Is 'Significantly Better' Than Others They're not all the same. David Nield ScienceAlert

Of the four types of masks tested, the duckbill N95 mask came out on top: it blocked 99 percent of large particles and 98 percent of small particles from getting out into the air. Overall, 98 percent of the viral load was blocked by the N95.

Study suggests cancer patients should stay current on COVID-19 boosters Yesterday in Nature Communications a study shows cancer that patients who are up to date on vaccines and have received COVID-19 boosters are more protected against death and serious complications than unvaccinated patients. CIDRAP

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What’s Really Going on With Bird Flu Wastewater Data

Wastewater, which can measure how much virus humans excrete, has become a valuable disease-tracking tool.

But using that tool to track our current viral threat, the H5N1 bird flu that has begun circulating in cows, is much trickier. Finding even high levels of bird flu in wastewater does not necessarily mean an area is experiencing an outbreak. Rather, it sets off a hunt for the source.