Science and medicine updates, March 24 - COVID-19 health and safety guidance

Maine statistics and COVID-19 News updates from Maine; NIH guidance for workers; COVID-19 survival on various surfaces; How COVID is spread; Why is there a COVID testing shortage?; Re-infection with COVID, immunity; What COVID-19 does to our lungs, how it causes respiratory failure; Ibuprofin vs Tylenol for COVID-19; Process of making a vaccine read more