Article content Canadian politicians and health officials keep telling us that they’re following the best science to combat the COVID-19 pandemic. But is that true? Try refreshing your browser, or Corbella: The science behind four-month shot interval just isn't there Back to video Owing to the botched vaccine procurement by Prime Minister Justin Trudeau’s federal government (that as of Wednesday has Canada placed 59th globally “in total vaccines per 100 people” as compiled by Our World in Data) Canada’s National Advisory Committee on Immunization (NACI) recommended in early March that the time between the first and second shot of a vaccine should be increased to four months — the longest spread in the world.