Canada became an outlier in the global fight against COVID-19 by allowing residents to mix various coronavirus vaccines. A growing number of countries are considering swapping in different COVID-19 vaccines into their programs as second doses or boosters, in light of supply delays and safety concerns tied to certain other shots. WATCH | What we know about mixing COVID-19 vaccines:COVID-19: What we know about mixing vaccines The National 2:25 Infectious diseases specialist Dr. Isaac Bogoch explains comments from the World Health Organization about COVID-19 vaccines taken out of context and what health experts know about mixing vaccines. 6:34That's similar to Canada's guiding recommendations from the National Advisory Committee on Immunization (NACI), which allow swapping in different vaccines for different doses in certain situations. While some countries are adopting a mixed dosing schedule, others are outright blocking people from entry if they mixed certain vaccines — and it's a similar situation with some cruise lines and overseas tourist attractions.

Source: CBC News July 29, 2021 22:18 UTC