I think they are stacking, because it would make it very difficult to trace the root cause. The boostered people seem to have had the most problems, for example. The whole "subscription service" for the flu shot always seemed weird to me even when I was a lot less skeptical.
I think they are stacking, because it would make it very difficult to trace the root cause. The boostered people seem to have had the most problems, for example. The whole "subscription service" for the flu shot always seemed weird to me even when I was a lot less skeptical.