The new bivalent COVID\u002D19 vaccines may not be better than the old shots at neutralizing Omicron, two new studies suggest. Learn more
came up with similar findings. That group looked at the responses in 15 people who received the original mRNA boosters and 18 who received the tweaked, bivalent boosters. People had had two to four prior COVID-19 vaccine doses, and a third of participants had a confirmed COVID infection during the Omicron surge.Article content
A spokesperson for Pfizer Canada said the company doesn’t typically comment on pre-print studies that they weren’t involved in. Pfizer recently shared, via press release, data that found people who received its bivalent shot showed a “substantial increase” in neutralizing antibodies against Omicron BA.4 and BA.5 in the first seven days, post booster dose.Advertisement 5The updated Moderna vaccine approved in Canada is different than the one tested in the two new studies.
“The concern that I have is if you talk up these bivalent boosters as being some kind of super strong shield … that encourages people to believe they’ve got amazingly strong protection against infection.Others are concerned the new research could further dampen the less-than-enthusiastic uptake of the reworked vaccines.
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