There was no decoder ring needed regarding that Tweet, 1st vaccine shot, 21 days later need the other(booster) shot, the app will give you a notification....not thinking any deep embedded message in the Tweet...would like Doc to verify publicly 1st quarter, don't believe he has..if wrong, thanks for the correction on the issue, no biggie.....hold on tight, because eventually Doc is going to come through for us..again, Doc's Twitter page is a great guide for what is instore for us very sooooooooon....obviously not soon enough but soon