Health experts warn of possible Covid-19 fourth wave

Waiting patiently: PPV UEM Edgenta Learning Centre is providing Covid-19 booster dose to the public. — YAP CHEE HONG/The Star

PETALING JAYA: In most countries that have reached a 90% vaccination rate, the number of Covid-19 cases will see a downward trend.

However, there is a return of cases in most instances in a U-shaped curve, said Penang Hospital infectious disease consultant Datuk Dr Chow Ting Soo.