I'll be getting the third shot sometime in late October before I start some extensive travel to Panama and South Africa. Current information suggests it provides a major boost in immune response, no surprise. The 8-month window is just a convenient place for the country to start this process, it really doesn't make much difference. Anything over four months is probably fine. Obviously the context here is that the vaccine supply is available now as the current vaccination rate is around 1m per day, so we can easily handle the third dose demand, and it makes sense to try to get older folk boosted before winter in case we get yet another wave then. It is too late to make a difference to the current wave. I'd love to get a delta-specific booster as I hope this may be our last major variant, but the current vaccines are effective enough against Delta. I got my second shot of Moderna in March, two months after my first shot because I thought a longer waiting period was appropriate, so in October it will be nearly 8 months. Unlike the covidiots here, having a third shot does not bother me at all, and I don't believe we will need annual shots, but if we do that does not worry me either. I already get the flu shot each year and have not had flu for over 30 years now. Unlike the covidiots, I am delighted with these amazing vaccines.