medical coronavirus flu virus nyc street face mask gloves covid19 stores shut down closed restaurants social distancing delivery cox 14 Crystal Cox/Business Insider Some people are claiming they’re “exempt” from mask wearing due to medical conditions they won’t disclose, according to one doctor on Twitter. Doctors say that even people […]
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Using polyacrylic acid solution in water as irrigation fluid in dentistry reduces risk of aerosolized pathogens. Here, the polymer is shown forming snakelike threads near the tip of a vibrating cavitron scaler (top), and it forms spools near the tip of a turbine-driven dental drill. In both cases, aerosolization is […]