Showing the value of a combination of lockdowns, social distancing, face masks, and non-overwhelmed hospitals, reported Covid-19 deaths in the U.S. went down 21% last week -- the biggest decline since the pandemic began. (The previous three weeks showed declines of around 4% per week.) The majority of states showed declines; the only states with statistically-meaningful increases were Iowa and New Mexico. (Math note: To learn the actual number of deaths in a state in a given week, take the population in millions (shown after the state name), multiply by 10, and multiply that by deaths per 100K. Thus, Alabama had 4.9 x 10 x 2.1, or 103 deaths last week.)