"I got my J&J vaccine but now I want the Pfizer vaccines" - Prof Tulio advises

Prof Tulio de Oliveira joins us from KRISP at UKZN, he is one of the world’s top virologists, virus hunters and bioinformaticians.
In today's session with the good Professor answers the questions:
- Is it really possible to create herd immunity with the vaccines?
- We know the vaccine is effective against death and hospitalisation, but are your chances to carry and transmit the virus also less?
- How long does the virus stay on goods?
- Why do people test positive once they have had their first vaccination 2-3 weeks later

You'll then find out what happens if you want to have both the jabs J&J and Pfizer vaccine