1. Patients of Persahabatan Central General Hospital, (COVID-19 national referral centre) 2. Patients infected with SARS-CoV-2 and identified through RT-PCR with positive results at Persahabatan Central General Hospital during 1st July – 30th September 2021 with CT values = 30 3. Asymptomatic patients or with mild symptoms 4. Patients being diagnosed with COVID-19 for less than three days 5. Aged 19 - 60 years old

1. Patients of Persahabatan Central General Hospital, (COVID-19 national referral centre) 2. Patients infected with SARS-CoV-2 and identified through RT-PCR with positive results at Persahabatan Central General Hospital during 1st July – 30th September 2021 with CT values = 30 3. Asymptomatic patients or with mild symptoms 4. Patients being diagnosed with COVID-19 for less than three days 5. Aged 19 - 60 years old