A fairly concise response, but not one that addresses the core issue. If the vaccine is “leaky” then herd immunity isn’t necessarily a deterrent since the virus continues to mutate in the hosts, we simply don’t get sick from it until it mutates to the point that the vaccine is no longer effective, as is the case with Marek’s. The booster model brings in new concerns that wouldn’t normally apply, but in all fairness, the research showing that Delta continues to be present in the same quantity as pre-vaccination also comes from India where a different vaccine is used (touched upon earlier in the thread), plus we don’t know if the virus is even active or not, only that it is present, so this would require further research which I’m sure is forthcoming. In any case, this new angle gave me some pause for thought and further solidified my belief that we all went the wrong way about the lockdown - I feel that it would’ve been significantly more effective if the jab was distributed *first*, that way we’d all have time away from everyday business that’d allow the vaccinations to take proper effect. No point in crying over milk that has long since soaked into the ground, but weighing the pros and cons the results were somewhat negligible in terms of public health, but devastating economically from the stats I’ve seen so far, which is a bit counterintuitive. Then again, I suppose that nowadays we all shop at supermarkets which are ultimately large gatherings with huge footfall, so it’s not completely unexpected.