COVID Vaccines Without Booster Dose Are Ineffective Against Omicron Variant 

All three Covid-19 vaccines approved in the United States seem to be much less effective against the newly discovered Omicron coronavirus variant in laboratory tests, but a booster dose likely restores the majority of protection, according to research published on Tuesday.


COVID Vaccines Without Booster Dose Are Ineffective Against Omicron Variant 

All three Covid-19 vaccines approved in the United States seem to be much less effective against the newly discovered Omicron coronavirus variant in laboratory tests, but a booster dose likely restores the majority of protection, according to research published on Tuesday.

The study, which has not been peer-reviewed, examined blood from individuals who received the Moderna, Johnson & Johnson, and Pfizer/BioNTech vaccinations against a pseudo-virus developed to imitate the Omicron variant.

The researchers discovered a “low to absent" antibody neutralisation reaction of the variation in all three vaccination — two injections of Moderna or Pfizer/BioNTech vaccines or one shot of J&J’s single-dose vaccines.

Source - NST

Moreover, the scientists stated that Omicron is more aggressive than earlier variants of concern, including around twice as transmissible as the presently prevalent Delta variant, which Omicron may replace in the near future.

The findings corroborate those of other recent studies. According to Oxford University researchers, the two-dose Pfizer and AstraZeneca Covid-19 vaccination regimens do not produce sufficient neutralising antibodies against the novel strain.

BioNTech and Pfizer announced last week that a three-shot course of their Covid-19 vaccine was effective in neutralising the novel Omicron version in a laboratory test, but that two doses resulted in much less neutralising antibodies.

Moderna and J&J have not yet released any data on the vaccines’ performance against the new variant. J&J won’t respond to comment about the latest research, and Moderna did not answer the request for comment.

Source – Malay Mail

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