He calls it "Reason number 23,900 on why you should take the COVID-19 vaccine". 

Saskatchewan's Dr. Hassan Masri was active on social media this weekend, once again offering proof that the vaccines are working. 

He shares a "large study of 365,000 households in England with a mix of vaccinated and unvaccinated members" which was done back in April. 

It found that "immunization with either Pfizer or AstraZeneca...reduced the chance of onward virus transmission by 40 to 60%". 

Dr. Masri explains, "This means that if someone became infected after being vaccinated, they were only around half as likely to pass their infection on to others compared to infected people who weren't vaccinated." 

So, if you have a friend or family member balking at vaccination, perhaps the question for them is, "If we know that vaccination will help protect your family and friends, why not do it for them?"