Malaysia : No Mixing Of COVID-19 Vaccines For Now

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Malaysia will not adopt heterologous vaccination – the mixing of COVID-19 vaccines – for now.

Here is what you need to know about mixing vaccines, and why they are not doing it…


Mixing Of COVID-19 Vaccines : Why Do That?

The idea of using two different vaccines to deliver better protection against a disease is called heterologous vaccination. Colloquially, that’s what people refer to as “mixing of COVID-19 vaccines”.

The first vaccine primes the immune system, and the second, different vaccine gives it a potent boost. Hence, it is also known as heterologous prime-boost vaccination.

In the fight against COVID-19, researchers are looking at combining a vector vaccine with an mRNA vaccine. Of great interest is the AstraZeneca-Pfizer combination.

This is becoming of critical importance with the development of highly-infectious variants, like the Delta variant which is partially resistant to vaccines.

US Japan vaccine contribution


Malaysia : No Mixing Of COVID-19 Vaccines For Now

With the surge of cases involving the Delta variant, many Malaysians are justly worried about receiving only one dose of the AstraZeneca vaccine.

After all, the Delta variant has been shown to infect people within mere seconds of a close contact!

However, the National Immunisation Programme Coordinating Minister, Khairy Jamaluddin said that mixing of vaccines involving the AstraZeneca vaccine is not on the table for now…

On 30 June 2021, he said that the second dose will remain the AstraZeneca vaccine.

Malaysia : No Mixing Of COVID-19 Vaccines For Now

Although the expert technical working group has presented JKJAV early real world data on heterologous vaccinations, that is mixing vaccines; we are still studying.

It is still inconclusive for us to make a decision to mix vaccines here in Malaysia. We will continue to study that and once a conclusive decision can be made, then we will announce that.

For now, you will be given the same vaccine as the first dose. If you received AstraZeneca for your first dose, you will receive AstraZeneca for your second dose.

Instead of trying out heterologous vaccinations, the Malaysia government has decided to bring forward the AstraZeneca vaccine dose interval.


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