The National Institute for Communicable Diseases (NICD) advised people who experience allergic reactions to the first dose of the Pfizer Covid-19 vaccine not to go for their second jab, and instead consult their healthcare providers for further advice.
The institute said it's normal to get symptoms after vaccination. This response means the immune system is responding to the vaccine in a way that will protect against the virus.
It added that some people have shown no side-effects to the vaccine, but this does not mean they are less protected.
According to the CDC in the US, causes of a severe allergic reaction can include a rapid heartbeat, difficulty breathing, swelling of the throat, or a generalised rash or hives. A person with a severe allergic reaction requires treatment with epinephrine or hospital admission.