OriginalTweet: Over 50% of Ontarians 50+ have received a booster dose of the #COVID19 vaccine!
   
  A booster dose provides additional protection against Omicron. Book as soon as you can at https://t.co/5RUHfJqBUs, select pharmacies and primary care settings, or visit a pop-up clinic. https://t.co/qWj6BmNd8C