WASHINGTON—A broad coalition of MPs from all five parties wants the federal government to support waiving the global rules that guard vaccine trade secrets. The group of 65 MPs has written a letter urging Prime Minister Justin Trudeau to support the proposed World Trade Organization waiver. The government has agreed to take part in talks, but says in a statement it “firmly believes” that protecting intellectual property is important. It also notes it supports other methods of expanding access to vaccines, providing $940 million to date to expand access in low- and middle-income countries. Supporters of the waiver say it would make it easier for developing countries to import the equipment, expertise and materials needed to make their own vaccines. The idea is opposed by the pharmaceutical industry and a number of key world leaders who say it would be counterproductive. “Our government firmly believes in the importance of protecting …