A video clip showing an old man who contracted Covid-19 walking into an ambulance had been circulated on social media for several days. The man, 82-year-old Mustafa Ismail, died a few days later.

Some irresponsible quarters then posted the footage on the short-form video application TikTok, falsely alleging that the late grandfather and his wife, Eshah Yusof, 73, were infected after their children returned to their hometown in...