Especially since Pfizer, you know... the ones who developed the vaccine so know it best, recommend second dose after 3 weeks.
Canada is in a similar spot now. I'm still waiting to see what happens with all those people who got a shot in Ontario, and due to supply problems, are going to have a huge delay in getting their second dose, maybe that 12 week or so mark.
Wouldn't surprise me in the slightest to find out they all need three shots now, because the first one got cancelled out due to such a delay to get the second shot, making the entire round of first shots not only a complete waste, but actually harmful because now even less people will be vaccinated opposed to if they kept that second dose available.
Not to mention, having say 70% of your population ~50% immune to KoVid is going to do sweet fuck all in stopping the spread.