02/03/2026
Recently a Singaporean friend raised a concern regarding the Tuberculosis situation in JB, asking whether she should avoid coming until the situation improves.
I wish to say that all newborns in Msia and Sg have been vaccinated with the Bacillus Calmette Gurrain (BCG) at birth. The vaccine contains an altered strain of Mycobacterium Bovis, so that it does not cause infection, but stimulates the immune system to make your baby resistant to the actual Mycobacterium Tuberculosis, which causes TB in humans. After administration of the vaccine a nodule may form on the injection site, which may ulcerate and may even discharge a yellowish pus like fluid. Do not worry. Soon, it will heal and form a scab and a small scar. However, picking at the scab may cause the formation of keloid scars, in susceptible individuals. This scar will be checked later when your child enters primary school. If there is no scar, your child would need to repeat his/her BCG vaccination.
Tuberculosis usually does not cause any symptoms in resistant individuals in a condition known as latent TB. However they may cause disease if the individual becomes immunocompromised, such as when they are taking certain chemo drugs, or if they are very old or very young, and weak.
TB is spread via close contact with infected individuals, usually staying together and sharing household items. Therefore, if a positive case is detected, their family and close contact will be screened for the disease. This involves doing a chest X-ray, a Mantoux (PPD) skin test and sputum culture.
Therefore, to my friends who still wish to come for their weekly shopping, I would say, if you are vaccinated (check for your scar) and healthy, chances of catching TB from a shopping trip is very low. In fact you would more likely to catch other viruses like RSV, HMPV and parainfluenza. Therefore, if you want to stock up on your groceries and essentials, please do practice basic hygiene such as handwashing and wearing a mask in crowded places to prevent catching any viruses.
Malaysians have been urged to stay vigilant. https://says.com/my/lifestyle/what-is-tuberculosis-is-it-dangerous