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Which science shows that masks, reused for days if not weeks, that have also been in glove boxes, in pockets, on car seats, touched on both sides by unwashed hands, contaminated on both sides, that are not changed for new nor freshly washed masks between interactions with different people, and which are often otherwise worn inccorectly have any efficacy?In short:What study shows that masks have efficacy, the way they are actually worn by most of the public?The only studies that show masks have any efficacy are in controlled medical environments where they are new (or sterilized by high temperatures between use), disposed between interactions with different people, worn for relatively short periods of time, and worn properly.Masks, the way we wear them, are useless dirty rags over our mouths and likely do more to introduce new pathogens to our lungs than to keep viruses out.#COVID