Il Canada interrompe le somministraioni di AstraZeneca alle persone sotto i 55 anni https://www.bloomberg.com/news/articles/2021-03-29/canadian-health-officials-issue-warning-over-astrazeneca-vaccine?utm_content=canada&utm_medium=social&cmpid%3D=socialflow-twitter-canada&utm_source=twitter&utm_campaign=socialflow-organic