Mae'r ail niwed yn deillio o gynnydd mewn ymddygiadau sy’n achosi risg. Dylai unrhyw un sydd â symptomau o haint anadlol aros gartref ac ni fyddai'n dderbyniol iddynt ddefnyddio gorchudd wyneb er mwyn mynd i siopa neu i weithio.
The second harm is from an increase in risky behaviours. Anyone with symptoms of a respiratory infection should be staying at home and it would not be acceptable for them to use a face covering in order to go shopping or to work.