Bruce Arthur: Better days are ahead. But the COVID-19 wrestling match between science and the people in charge isn’t over yet

Did you feel it? That burst of optimism? It's what happens when temperatures climb above freezing in Toronto, and a new vaccine is approved. Friday was another good day for science, partly because the AstraZeneca COVID-19 vaccine was approved by Health Canada, leaving the country with three vaccines to choose from. A prospective fourth, Johnson & Johnson, was supported by a key U.S. Food and Drug Administration panel, and is said not to be far from approval here. Better days are coming.