Masks on patients as prevention

"both surgical and cotton masks seem to be ineffective in preventing the dissemination of SARS–CoV-2 from the coughs of patients with COVID-19 to the environment and external mask surface." https://annals.org/aim/fullarticle/2764367/effectiveness-surgical-cotton-masks-blocking-sars-cov-2-controlled-comparison?fbclid=IwAR3aX2LkHzVKej9OX4ruIlVarGOZe5T-dBIMnDqLlIAUZ29Q_gwYQLvMGkw