Unfortunately as Omicron runs rampant many have not been able to get their
booster before they caught Covid. The eligibility date is being reduced to
3mths after the second jab to give more people the opportunity to get the
booster sooner hopefully before they contract Covid.
Boosters markedly increase protection as advised below."How effective are booster shots?
So far, research shows that people vaccinated with a third COVID-19 shot have a stronger immune response to Omicron than those vaccinated with just two doses.
According to the latest UK data, vaccine effectiveness against symptomatic disease rose to 65-75 per cent two to four weeks after a booster vaccine with either Pfizer or Moderna.
Against hospitalisation, a third dose (of either) boosted protection to 92 per cent on average.
Dr Quinn said third doses helped to both increase antibody levels and improve the protection offered by T-cells, another important component of the immune system linked to the prevention of severe disease.
"If you get a high enough level of antibodies, it sort of wakes up your memory immune cells, which can promote their survival and lead to more durable responses over time," Dr Quinn said.
"It can also improve the quality of our immune response by making the types of antibodies we produce better."
https://www.abc.net.au/news/health/2022-01-19/covid-booster-vaccination-pfizer-moderna-astrazeneca/100763758
