Health authorities from the European Union have backed up the mixing of COVID-19 vaccines for the booster.
This, they say, could in some cases produce a better response than a single jab. The best results come from what is called a viral vector shot, such as AstraZeneca or Johnson&Johnson shot, followed by Moderna or Pfizer after (mRNA).
The European Medicines Agency (EMA) and European Centre for Disease Prevention and Control (ECDC) said in a joint statement that the so-called mix and match approach can be used for both initial jabs and boosters.
This approach may also lend countries some flexibility as they deal with a resurgence in cases, especially they are short in stock of a particular jab.
Many European countries have started giving the follow up booster six months after the first immunisation. With the EU currently approving four vaccines, some studies suggest that despite some minor side effects being stronger with this approach, they are inconsistent.
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Photo Source: Yale Medicine