I spent 4 hours at the Winnipeg Public Library today and I couldn't find the stories on the topic of the Manitoba government wanting to deny permission for the family to adopt an HIV+ child due to the medical costs being $10,000 a month. The folks working at the reference desk couldn't help either. It's annoying because I 1,000% remember reading the story but I can't find any of the articles in the newspaper archives or with google.ca or wherever.
If you want to devote time to the research, the newspapers in Winnipeg, Manitoba where I would have read the story are: The Winnipeg Free Press (now the Free Press) and the Winnipeg Sun. The national newspapers in Canada are the Globe & Mail and the National Post. ALL of these newspapers would have run the story and possibly editorials around the ethics of allowing Canadian taxpayers to foot the expensive bill for a foreign child's HIV medication.
During the 90s, the federal government in Canada was concerned about the national debt and underwent a severe cost cutting exercise, a lot of health care costs were passed on to the provinces and the funding mechanism was changed. It used to be that health care was funded on a per capita basis but in the 90s, the federal government gave provinces blocks of funding (block funding) and the provinces had the responsibility to spend it wisely on health care. Like, they got less money but more control over how to spend it. Federal governments have been dealing with provinces clamouring for more funding ever since and saying that if they want more funds, they have to commit to doing X, Y, and Z (improving outcomes) and the provinces have resisted.
I looked for keywords like: denied medical costs, HIV+, adoptive child, Manitoba, Health care and I searched for the years of 1995 to 2000, then 1990 to 1995. It HAD to be in those years. Earlier than that, I wasn't reading the newspaper (no interest) and in the years of 92-94 I was studying in the USA so I would not have seen the story in 92-94. I tried dropping "adoptive" and playing with the years but....
Additional places to look are reddit's r/winnipeg and r/manitoba, plus maybe r/disability? There's probably an HIV+ subreddit and also an AIDS subreddit. The challenge will be finding people who remember events from 30 years ago. If you have an HIV/AIDS clinic in your region, they *MIGHT* have heard of this story because the issue of covering medical costs for people who are HIV+/have AIDS is a huge ethics issue - or it used to be when medications were more expensive and insurance companies were playing games, denying people care and so on.