The most immediate and significant benefits will come from reducing opportunities for large numbers of people to mix in poorly ventilated indoor spaces.
Daw’r manteision mwyaf uniongyrchol a sylweddol o ganlyniad i leihau’r cyfleoedd i nifer mawr o bobl gymysgu â’i gilydd mewn mannau o dan do lle nad oes hawyru digonol.