If you are looking for more information than these websites provide, try searching for a non-profit medical or patient association related to the disease you are interested in.
For example, the Alzheimer's Society of Canada would have a lot of reliable information for Alzheimer patients, medical practitioners and family members.
Grey Literature is information published outside the usual streams of academic publishing, but may still contain valuable, high quality information.
Examples include reports, research or working papers from:
In addition to traditional report/research articles, you can also find thesis and dissertations, audits, standards, regulations, professional guidelines and benchmarks, summaries of clinical trials or other research, surveys, policy & procedure documentation and conference proceedings.
Often the best approach to finding this grey literature is using Google's Advanced Search interface.
Think about who might be interested in gathering information on your particular topic, and what words may appear in their websites or documentation.
Some Advanced Google Search suggestions:
Author last name, A. A. (date). Title of document. Publisher if different from author. http://www.xxxx
World Health Organization. (2019, January 24). Universal health coverage (UHC). https://www.who.int/news-room/fact-sheets/detail/universal-health-coverage-(uhc)
Bruce, I. (2019, November 21). Sustainable transport key to tackling the climate crisis. David Suzuki Foundation. https://davidsuzuki.org/expert-article/sustainable-transport-key-to-tackling-the-climate-crisis/
Glasner, E. (2019, December 3). China is becoming the biggest movie market in the world — and changing what you watch. CBC News. https://www.cbc.ca/news/entertainment/china-movies-censorship-1.5381349
In text citation: ... (World Health Organization [WHO], 2019) the first time, then (WHO, 2019) ... (Bruce, 2019) ... (Glasner, 2019)
Note: if quoting also include a page number or other locator, for example a section title, heading or paragraph
Author, A. A. (date). Title of post [Description of audiovisuals]. Site Name. https://xxxxx
Kwantlen Student Association. (2019, December 2). In preparation for the release of Episonde IX - The Rise of Skywalker we will be holding a Star Wars movie [Image attached] [Status update]. Facebook. https://www.facebook.com/KSAcouncil/photos/a.225203104188652/3309226592452939/?type=3
KPU Library [@KPULibrary]. (2019, December 4). Does your brain hurt from studying? Find our Exam BreakAway tables at your campus library for a bit of mindless [Photographs attached] [Tweet]. Twitter. https://twitter.com/KPULibrary/status/1202328529205002242
Greta Thunberg [@gretathunberg]. (2019, December 7). 500’000 people marched in Madrid last night. This is the beginning of change! The world is slowly waking up to [Photograph]. Instagram. https://www.instagram.com/p/B5xF5yUp2SE/
In text citation: ... (Kwantlen Student Association [KSA], 2019) the first time, then ... (KSA, 2019) ... (KPU Library, 2019) ... (Greta Thunberg, 2019)