A lot has been made in the media about the relative effectiveness of the different vaccines for Covid 19. There is a perception out there that certain vaccines (eg Pfizer /Moderna) might be better than certain others (Astra Zeneca / Johnson and Johnson).
The bottom line, whatever you might read, is that they are all very effective at reducing the risk of hospitalisation or death. No one who has been fully vaccinated has died, or been admitted to hospital with a Covid 19 infection, in any of the vaccine clinical trials
The most effective vaccine is the one that’s in your arm….
Here is really good explainer from Vox magazine about the different vaccines which I found really helpful in understanding it.