This is very clear, helpful and reassuring.
immunology.org/news/bsi-sta...
“All three of the COVID-19 vaccines (Pfizer/BioNTech; AstraZeneca/Oxford; Moderna) that have currently been approved for use in the UK are safe to use for people who are immunocompromised or immunosuppressed. None of these approved COVID-19 vaccines contain any active SARS-CoV-2 virus. The Pfizer/BioNTech and Moderna COVID-19 vaccines are both mRNA vaccines which contain a small piece of genetic code from the SARS-CoV-2 virus to generate an immune response. The AstraZeneca/Oxford COVID-19 vaccine is a viral vector vaccine, which uses an inactive unrelated virus (the viral vector) which cannot replicate to deliver SARS-CoV-2 genetic material to generate an immune response.
While COVID-19 vaccination might provide a lower level of protection in people who are immunosuppressed or immunocompromised compared with the rest of the population, it is still very important that you get vaccinated as it will offer you a certain amount of protection against catching COVID-19. It is important that you receive two doses of the vaccine to maximise the protection that vaccination offers you.
COVID-19 vaccination will work best if you have a functioning immune system. For people currently undergoing whole organ or stem cell transplant and who may be severely immunocompromised, you should talk to your medical treatment team about the most suitable time to get your COVID-19 vaccination.
It’s important to remember that the COVID-19 vaccines can protect you from getting seriously ill with COVID-19, although if your immune system isn’t functioning optimally this protection will not be complete. We don’t currently have any evidence that the vaccines can stop you passing on the virus to others even if you make a good immune response. This means that even after you have been vaccinated, it’s very important that you still follow social distancing guidelines and wash your hands regularly.
If you have any questions or concerns, you should talk to your medical team or GP in the first instance.“