The Omicron variant of COVID-19 is challenging the effectiveness of the Pfizer and BioNTech vaccines as a new study shows that the protection offered by these vaccines begins to weaken three weeks after the second or third dose.
Many experts believe that the antibodies produced by the vaccines are short term and start losing their effectiveness after time which is why additional booster shots may be needed.
On Friday, JAMA Network published a Danish study, according to which 128 people were observed, who received multiple doses of Pfizer or BioNTech vaccine.
Scientists noted that the neutralizing antibodies produced by the vaccine significantly went down within a few weeks after receiving the second or third dose. The antibodies stop the virus from spreading and attack the infection in its early stages.
According to the study, Omicron-specific antibodies declined significantly three weeks after the dose, as compared to the response of antibodies to the original and Delta variant. The antibodies fell over 76% after just four weeks.
Even though a third dose increased the level of Omicron-specific antibodies initially, they too began to fall drastically after the third week.
Researchers concluded that the level of antibodies fell four weeks after receiving the second dose, and around three weeks after receiving the third dose. This explains why people, who have been fully immunized and even got booster shots, still end up catching the Omicron variant.
Previous studies have confirmed that the effects of the vaccination are almost entirely lost six months after the jab.
U.S. Centers for Disease Control and Prevention reported that around 91% of older adults in the U.S. have completed their immunization rounds while 69% have received booster shots. In March, the U.S. Food and Drug Administration also authorized a second booster dose for people older than 50 years.
The ineffectiveness of the vaccine puts a giant hole in half of the vaccines marketing slogan — safe and effective. The question concerning many Americans, with so much disinformation being spread about COVID-19 vaccinations, is the obvious one: Is there a hole in the other half of the slogan?