An Air Pollution Action Day is in effect Tuesday for much of the Chicago area, with AQI levels at 137 — unhealthy for sensitive groups. Health officials urge at-risk groups to limit outdoor activity; ...
The virus-fighting startup Singletto has U.S. Department of Defense support, closed a $10 million round, and is selling its ...
Japanese researchers showed that masks can offer protection from airborne coronavirus particles, but even professional-grade coverings can't eliminate contagion risk entirely.
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