Seems they are changing information to suit needs. In the US, the FDA approved it based on two shots 3 weeks apart. I heard the same about pushing out the second shot so more people have some immunity versus less people with more. The equation was, 100 people in a house and you have 100 shots. Is it safer to have 50 people with 95% immunity (47 people safe) or 100 people with 75% immunity (75 people). Who knows if it's crap but with limited doses, it sounds like moving the goal post.
They are doing the same with schools. 6' distance until a few weeks ago, now 3 feet is safe. Schools simply don't have the sq. footage to do 6' and return all kids.
Not saying not true, just saying.