A growing number of countries are looking at switching to different Covid-19 vaccines for second doses amid supply delays and safety concerns that have slowed their vaccination campaigns. Several medical studies to test the efficacy of switching Covid-19 vaccines are under way. The following are countries that are weighing, or have decided to adopt, such a solution:
CANADA
* Officials said in May that people who were inoculated with AstraZeneca’s Covid-19 shot may be offered a second dose of another vaccine, a move based on supply concerns as well as the rise in incidence of rare blood clots linked to first doses produced by the Anglo-Swedish drugmaker.
CHINA
* Chinese re…
Keep on reading: Countries weigh ‘mix and match’ COVID shots