The Health Ministry plans to conduct a study on heterologous Covid-19 vaccine booster shots, said its minister Khairy Jamaluddin.

Heterologous boosters refer to using a different vaccine as a booster shot instead of the same vaccine that was used in the recipient's primary vaccination. Using the same vaccine as a booster is known as a homologous booster.

“The study will be performed in Sarawak in November 2021 and will be expanded to other states after...