Third source (biostrap.com): "People who are deficient in iron and other vitamins may also have low blood oxygen levels. That’s because iron is what binds to oxygen and carbon dioxide in the bloodstream. Deficiencies in vitamins including vitamin B12, vitamin C, and folate can also cause anemia and low oxygen saturation". Source: over 2 years ago

Congrats on coronavirus.app, I actually used it a ton a while back. You can actually control behavior between desktop/mobile, you just need to build two different pages and set a temp page on load that id's which device the user is on, and based on that it would send them to page.com or page.com/mob. Source: almost 3 years ago

I also built coronavirus.app. Most of the logic could have been developed with Bubble. The responsiveness of the design, I'm not so sure, though. If you're looking to have complete control on how things look, Bubble probably won't be enough. Or if you want the app to behave substantially differently on mobile and desktop, no-code probably isn't the right tool for the job. Also, I'm not sure how well Bubble scales.... Source: almost 3 years ago

The video had almost exclusively graphs from OWID (posted before) and also coronavirus.app but organized and presented in a certain way. Source: almost 3 years ago