Could High Quality Masks Solve China's COVID Problems? Idea For A Randomized Control Trial Of Masks In Households To Find Out
This is a suggestion for a way to resolve questions such as: How effective are the best FFP3 / N99 masks at breaking transmission of COVID? However effective is eye protection when combined with the best masks? How effective is ventilation with HEPA filters? Informed expert opinion can't resolve these questions at present with opinions that range from almost no effect to highly effective. We have many studies but most are observational and from the range of expert opinion it is clear that so far they have had limiations and are not conclusive.
