On Feb 27 to Mar 3, some 14,500 Malaysians and 1,500 others are believed to have attended a tabligh event held at Masjid Sri Petaling, Kuala Lumpur. On Mar 9, Brunei announced its first case, a man who attended this event. Since then, it is a race against time to trace and test all who attended.
The government wants to get all of the participants of the tabligh event and their close contacts tested. As of Jul 15, 2020, it has taken 42,023 samples.