The weekend is nearly here and CTV News has all of the day's top stories. Here are the five things you need to know: Three Canadians are infected with the Zika virus; Prime Minister Justin Trudeau is in La Loche, Sask. to pay tribute to the school shooting victims; Canada's electronic spy agency is facing criticism; Alberta is set to announce its new royalty review; a union is in hot water after paying members to attend an election campaign event.

1. Zika virus: Three Canadians are infected with the Zika virus, and airlines are now allowing passengers to change bookings if they reserved a flight to an affected country. Meanwhile, a Canadian scientist is helping to develop a vaccine that could be ready by the end of the year.

2. La Loche shootings: Prime Minister Justin Trudeau and Saskatchewan Premier Brad Wall will visit the remote northern community of La Loche today, where a school shooting left four people dead and seven injured. Trudeau said he would meet with families of the victims.

3. Privacy concerns: Canada's electronic spy agency is being criticized for breaching privacy rules by sharing certain types of information with its counterparts in the U.S., U.K., Australia and New Zealand.

4. Under review: Alberta is reviewing its oil and gas royalty framework, with industry players worried about how the announcement will hurt the already reeling oil industry. It's gotten so bad, laid off workers have turned to pawning their possessions.

5. Union payments: The Commissioner of Canada Elections says a trade union in Ontario broke Canada Election Act rules when it paid some of its members to stand behind Justin Trudeau during a campaign event in Waterloo, Ont.

And one more thing for Flashback Friday...On this day in 2006, 70 miners were awaiting rescue after a fire nearly 1 km underground, in the Mosaic potash mine in Saskatchewan.

Mosaic K2 potash mine