Fourth Dose Boosters of COVID-19 Vaccine – Update

It was announced on January 13, 2022, that immunocompromised individuals may begin booking appointments to receive their 4th dose of the COVID-19 vaccine. Here is some information and resources for your reference:

– If your patient has had 3 doses of the vaccine (what the MoH is calling the “primary series”), they are eligible to receive a booster dose (i.e. 4th dose) ≥3 months (84 days) after their 3rd dose. The 4th dose booster shot is only available to >18 years of age (not available to younger populations, even if immunocompromised)

– It is important to note that 4th dose boosters are for immunocompromised individuals, such as rheumatology patients, who qualified for 3rd doses based on their medication. More information, including the full list of qualifying medications may be found here: (

– Referral letters are NOT required. Patient attestation (e.g. prescription list or medication package) will be accepted. The MoH is using every available tool to make this clear to all public health units, hospital clinics, mobile or pop-up clinics and participating pharmacies

– Eligible patients can book their vaccine through the Provincial Vaccine Contact Centre at 1-833-943-3900. Appointments can also be booked directly through public health units that use their own booking system, participating pharmacies, Indigenous-led vaccination clinics, select primary care settings, hospital clinics and mobile or pop-up clinics, such as the GO-VAXX bus.