‘public health leaders rebranded personal care as a display of patriotism and duty to make men to wear masks.’
‘In 1927, Edwin Jordan’s definitive study, published in the Journal of the American Medical Association as a series of articles and then as a book, determined that masks were effective when worn by patients already sick or by those directly exposed to victims, including nurses and physicians.’
I was indeed guessing but there is an interesting read
https://rarehistoricalphotos.com/masks-spanish-flu-1918/
‘public health leaders rebranded personal care as a display of patriotism and duty to make men to wear masks.’
‘In 1927, Edwin Jordan’s definitive study, published in the Journal of the American Medical Association as a series of articles and then as a book, determined that masks were effective when worn by patients already sick or by those directly exposed to victims, including nurses and physicians.’
Thanks!