From the New York Times this morning, authorities in the U.S. are considering delaying that second Moderna and Pfizer second shot so more people can be vaccinated.  While Anthony Fauci is against doing this, the UK has better controlled this infection by doing so: And remember, this is the country from which came that B.1.1.7 variant.  The two key points are that more of the population can be made partially immune after only one shot, and it is possible that a slight delay from the three-weeks to a month period to, say, three months or four, might make the vaccine even more effective than the 95% announced rate.  From the NYT: B ritain and the U.S. have now given a roughly similar number of   total shots per capita . The difference is that Britain has deliberately delayed second shots, by up to 12 weeks. The results are   impressive . Further, the FDA and CDC called for a pause of the Johnson & Johnson vaccine because 6 out of 6.8 million experienced extremely rare blood clots th