The post where this user gets the second dose is oddly missing unless we are meant to infer that it was given Oct. 7 and that is the reason for the brutal headache. Um it would be interesting if the second dose was administered closer to the Nov 4 date. Otherwise it is an interesting post definitely shows the efficacy of the vaccines are not what was promised. If we assume the Oct 7th date as the date of the second dose then it was less than a month worth of protection. Theoretically though the second dose could have been any time after May 16 so even if person gets it around end of May... that is 6 mo. protection only...