Getting several vaccines at once is a well-studied, routine practice.
The immune system can handle it
The immune system deals with large numbers of bacteria and viruses from the environment every day. The antigens in a few vaccines are tiny by comparison. Getting them together doesn't dilute protection; each vaccine still produces its expected immune response.
It's how the children's programme works
The Hong Kong Childhood Immunisation Programme gives several vaccines in a single visit. This provides protection as early as possible and cuts the number of trips parents make with their children. The approach is backed by long-term evidence.
Flu shot and COVID-19 vaccine
Under informed consent, COVID-19 vaccine may be given with seasonal influenza vaccine, or at any time before or after it. That guidance does not require a routine minimum 14-day gap; a clinician must still check individual suitability and vaccine-specific restrictions.
The few cases that need spacing
Some vaccines, especially two live-attenuated ones, may need a gap between them. When more than one vaccine is given together, health professionals follow current guidance on injection sites and timing.
Check COVID-19 service availability separately
Service check, 17 October 2026: CHP still reports a temporary suspension of the government COVID-19 vaccination service after the LP.8.1 supply expired. An expected resumption in the fourth quarter is not a confirmed reopening date. Check the official notice and provider for current service, formulation and supply.