Tornado Alley (PROG)

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Two - three months is the present established best interval period between shots.

Do people have to receive two doses and do they have to be the same type of COVID-19 vaccine for it to be effective?

Yes, it is important that every person who receives a COVID-19 vaccine receive the full two-dose course of a vaccine. Both Pfizer and AstraZeneca require 2 doses to provide the best immunity. Pfizer doses are given at least 21 days apart. AstraZeneca doses can be given 4 – 12 weeks apart, but the Australian Technical Advisory Group in Immunisation recommend doses should be 12 weeks apart. When it’s your turn to get the COVID-19 vaccine, you will be able to make that equally important follow up appointment.

It is important you get the same type of COVID-19 vaccine. This is because the evidence from clinical trials shows this is effective and is what is approved for use by the Therapeutic Goods Administration (TGA).

With links - https://www.health.gov.au/initiatives-and-programs/covid-19-vaccines/is-it-true/is-it-true-do-people-have-to-receive-two-doses-and-do-they-have-to-be-the-same-type-of-covid-19-vaccine-for-it-to-be-effective