Sales executive Muhamaad Faizal Awang Kechil's voice cracks with emotion as he shares his experience after being diagnosed with Covid-19 for the second time. His second bout - three days after receiving his booster shot - is more serious than his first.

"After being reinfected for the second time early this year, I was seriously devastated, depressed and stressed out and was also afraid at the thought of having to go through the same ordeal when I was first infected with the (SARS-CoV-2) virus in March 2020.

"In my first case, I had to...