Most colds and flu are caused by viruses, which antibiotics cannot treat. Here is what federal health officials say actually helps, and why it matters.

A $9.99M Rothwell Heights home tops Ottawa’s priciest listings this October, more than twice the next, a Rideau River estate in North Gower.

J.W. McConnell’s former Golden Square Mile mansion, at $29.5M, leads Montreal’s priciest homes for sale this October, with five Westmount homes behind it.

A $10.75M Crescent Road estate with skyline views is still Calgary’s priciest home for sale this October, ahead of Aspen Woods and Mount Royal homes.

A $28M concrete-and-steel Point Grey home leads Vancouver’s priciest houses for sale this October, followed by Drummond Drive and Shaughnessy estates.

A $48M Bridle Path ravine estate leads Toronto’s priciest homes for sale this October, with Casa Loma, Forest Hill and Bridle Path mansions behind it.

A $58.8M West Vancouver waterfront estate tops Canada’s priciest homes for sale this October, ahead of Caulfeild, the Bridle Path and Whistler.

The budget watchdog pegs the Toronto-Quebec City Alto line at $75B to $113B, above Ottawa’s $60B-$90B range. The tunnel, route and delay costs driving the gap.

Trade Minister Maninder Sidhu and U.S. trade czar Jamieson Greer spoke at the G20 in Milwaukee, but Greer says the U.S. is not inclined to go to zero tariffs.