My appointment for the second Pfizer shot has been rescheduled, to exactly 21 days out, from my first shot (4 days later than the 17 days out, that I was told at first).
Per a text message from my health care provider, the CDC guidance for second shots has been updated. (It seems that before today, there was a 4-day grace period, so the second shot could be had as early as 4 days before the 21-day mark, or 4 days after the 21-day mark).
You should get your second shot as close to the recommended 3-week or 4-week interval as possible. However, your second dose may be given up to 6 weeks (42 days) after the first dose, if necessary. You should not get the second dose early … However, if you do receive your second shot of COVID-19 vaccine earlier or later than recommended, you do not have to restart the vaccine series.
P.S. So Johnson & Johnson’s single-shot vaccine is back in business, in the US, in Europe and in South Africa. Good news.