No shots...not getting in.

The decision may have been made for political reasons, but it is entirely consistent with the science. The efficacy of vaccines is well understood and they are widely available. The scientific community is unanimous in recommending the vaccine. There is no question that requiring a vaccine for entry to Canada reduces the transmission of COVID into Canada.

Now if they decide to remove this requirement because it is unpopular, that would be a political decision that goes against the science. Lets hope they don't do that, but for now this decision as well as the one to reduce quarantine requirements for vaccinated Canadians seems to be quite popular.