“ The booster shots were reformulated last August to target the BA.4 and BA.5 omicron subvariants, in addition to the original strain of the virus.
BA.4 and BA.5 are no longer in circulation in the U.S.
As of Saturday, roughly 78% of new U.S. Covid cases are caused by the omicron subvariant XBB.1.5, according to the CDC.
A CDC report published in January found that the updated Covid boosters reduced the risk of Covid infection from the XBB.1.5 subvariant by nearly half. Another study, published by Israeli researchers in the Lancet this month, found that the Covid boosters reduced the risk of hospitalization in people 65 and older by 72%. Neither study, however, looked at the effects of receiving two doses of the bivalent booster.”
http://www.nbcnews.com/health/health-news/fda-authorizes-2nd-dose-updated-covid-booster-older-adults-rcna79568
Kind of confusing stuff. Why not go for a new formulation?
Let’s see what the CDC decides……at this point in the game we need better vaccine and guidance for those who have been vaccinated and boosted. No more “studies”.
For the rest, it is obvious the bivalent booster will give them a fighting chance.
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