Are all COVID Vaccines equally effective ?
But until recently there has been hardly any direct clinical studies comparing different vaccines.
A recent study conducted in Belgium compared the Moderna and Pfizer COVID vaccines.
The study looked at antibody responses following vaccination in Health care workers. Antibody levels were measured prior to vaccination as well as 6 to 10 weeks after the second dose.
Higher antibody levels were observed in people vaccinated with Moderna vaccine compared with those vaccinated with Pfizer vaccine.
Future research is needed to see how these differences affect the general population.
Both Moderna and Pfizer vaccines are based on same technology (mRNA based vaccines).
If significant differences exist between between vaccines of same technology, then it is likely that differences would exist between vaccines of different technology (eg Pfizer vs Astra Zeneca).
The public health authorities would need to decide whether booster vaccinations should be done with a different vaccine.
Bloomberg. Moderna Creates Twice as Many Antibodies as Pfizer, Study Shows
By Jason Gale
31 August 2021, 03:54 BST
JAMA Research Letter
August 30, 2021
Comparison of SARS-CoV-2 Antibody Response Following Vaccination With BNT162b2 and mRNA-1273
Deborah Steensels, PharmD, PhD1; Noella Pierlet, MSc1; Joris Penders, MD, PhD1; et al . JAMA. Published online August 30, 2021. doi:10.1001/jama.2021.15125
(mRNA-1273 is Moderna Vaccine and BNT162b2 is Pfizer vaccine).
Daily Mail. ALL over-50s will get Covid booster shots by autumn: People who got AstraZeneca ‘are set to be offered a Pfizer jab’ in new vaccine drive because it is more effective against Indian variant. By Katie Feehan For Mailonline and Glen Owen for The Mail on Sunday
10:12, 01 Aug 2021 , updated 18:02, 01 Aug 2021
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