MISSOURI – With soaring varian delta, various reports indicate that some people who have been vaccinated are still infected Covid-19 virus. However, these infections are mostly mild. All vaccines still work best by any measure.
“The vaccines are very effective in doing what we want, which is to protect people from serious illness and death,” said Bill Powderly, a health expert and director of the Institute of Public Health at Washington University, St. Louis, Missouri.
Recent infections in Israel have raised concerns that some vaccines are weaker against the delta variant. But Bill Powderly said the vaccine prevented the worst cases, as shown by the surge in the state of Missouri.
“They are witnessing infection the way the Israelis see it, in people who have been vaccinated. However, none of those infected were hospitalized. All hospitalizations, and unfortunately, all deaths, have occurred in people who have not been vaccinated.”
(Also read: Hajj During the Covid Pandemic, the Mataf Route Around the Kaaba Rearranged)
Some vaccines are better than others at strengthening the immune system.
Moderna and Pfizer mRNA vaccines generally appear to produce the most antibodies, followed by viral vector vaccines: Johnson & Johnson, Oxford University-AstraZeneca and Sputnik V vaccines.
Vaccines using attenuated viruses such as China’s Sinovac and Sinopharm are at the lower end of the efficacy scale.
All vaccines produce sufficient antibodies against the original strain, but antibody levels play a more important role against new variants, said Peter Openshaw, professor of medicine at Imperial College London in an interview.
(Also read: Discarded Carelessly, Giant Goldfish Damage Lakes in the US)
