“Despite strict lockdowns … pandemic has shown no sign of retreat”

Perhaps there is a clue in this – may be lock downs are not very effective at stopping the spread of Covid-19?

Despite strict lockdowns and mandatory business closures by state and local officials, the pandemic has shown no sign of retreat this week, killing more than 4,000 people nationwide for the second consecutive day on Thursday.

Source: U.S. governors work to speed up vaccinations, Biden pledges faster distribution | Reuters