Various measures were taken and restrictions put in place to help stop the spread of Covid-19. There is debate as to whether they helped or hindered the situation.
"Three weeks to flatten the curve."
'It is difficult to get a man to understand something when his salary depends on his not understanding it.' Upton Sinclair, Novelist & Journalist, via Mark Devlin in Musical Truth Volume 3
"Vitamin D is a fundamentally important steroid hormone."