am I correct in my understanding that astra has 62% efficacy after the 2nd shot? Meaning you maybe get 30% or so after 1st shot?
Although 62% effective in preventing COVID it is proving to be very effective and preventing serious illness and death. I can deal with a sniffle provided I know my family and I are protected from hospitalization.
I do however if given a choice or by chance prefer J & J as my jab of choice based on the one-shot convenience and Pfizer or Moderna as the second choice this leaving AZ as my no choice must take shot.
Canada's National Advisory Committee on Immunization is giving the Oxford-AstraZeneca COVID-19 vaccine the green light to be used on adults who are 65 or older.
www.ctvnews.ca
HOW EFFECTIVE IS IT?
Data from clinical trials showed AstraZeneca was 62 per cent effective in preventing COVID infections, but it also prevented death and hospitalization in all participants who got the virus after receiving the vaccine.
Efficacy was a major talking point when AstraZeneca was first approved, with some comparing it to the 95 per cent efficacy shown in mRNA vaccine trials from Pfizer and Moderna. But experts have stressed that all the authorized vaccines offer excellent protection against severe disease.
Dr. Zain Chagla, an infectious disease expert with McMaster University, says when dosing regimens are factored in, AstraZeneca's efficacy rises to "70 to 80 per cent by the second dose, which is comparable to Pfizer, Moderna and Johnson & Johnson."
Real-world data is emerging that may also suggest the efficacy of AstraZeneca's vaccine increases over a longer time interval between the first and second shot. Clinical trials used a four-week span between doses but some countries have been delaying second doses by several weeks.