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Scientists develop low-cost way to test mask against viral droplets

According to the researchers from Duke University in the US, the preliminary, proof-of-principle findings suggest that professional-grade N95 masks, surgical or polypropylene masks, and handmade cotton masks may all block much of the droplet-spray produced when wearers speak.

However, they said bandanas and neck fleeces likely provide little protection, as the scientists observed that more droplets are expelled through these materials.

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Why the Coronavirus Is More Likely to ‘Superspread’ Than the Flu

“There’s this small percentage of people who appear to infect a lot of people,” said Dr. Joshua Schiffer, a physician and mathematical modeling expert who studies infectious diseases at the Fred Hutchinson Cancer Research Center in Seattle. Estimates vary from population to population, but they consistently show a striking skew: Between 10 and 20 percent of coronavirus cases may seed 80 percent of new infections. Other respiratory diseases, like the flu, are far more egalitarian in their spread.

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Covid’s spreading fast because billions don’t have water to wash

Underprivileged people in cities are particularly vulnerable as they often live in densely populated areas where social distancing is hard, especially if they have to share a water source. Transmission in the Americas has been tougher to contain in poor urban areas that have limited access to water, sanitation and public health services, said Carissa Etienne, director of the Pan American Health Organization.

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Fauci warns COVID-19 vaccine may be only partially effective, public health measures still needed

“We don’t know yet what the efficacy might be. We don’t know if it will be 50% or 60%. I’d like it to be 75% or more,” Fauci said in a webinar hosted by Brown University. “But the chances of it being 98% effective is not great, which means you must never abandon the public health approach.”

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Rare syndrome linked to COVID-19 found in nearly 600 U.S. children -CDC

Multisystem inflammatory syndrome (MIS-C) is a rare but severe condition that shares symptoms with toxic shock and Kawasaki disease, including fever, rashes, swollen glands and, in severe cases, heart inflammation.

It has been reported in children and adolescent patients about two to four weeks after the onset of COVID-19.With rising COVID-19 cases, there could be an increased occurrence of MIS-C, but this might not be apparent immediately because of the delay in development of symptoms, said the report’s authors, including those from the CDC’s COVID-19 response team.

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