Idk why, but my gut is leaning towards this side:

"Or the aftermath of the vaccinations."

They're really focused on having us all vaccinated and passed laws that state we can be placed in camps if we refuse to be vaccinated. Then as you know, months before this there was the ID2020 situation, as well as the Reddit AMA Bill Gates did where he spoke about creating international digital IDs distributed on a national level (which he failed to mention are planned to be placed into or under the skin, so the ID is the most "portable" ID as well as "relevant", as the information is "constantly digitally updating"), which would reveal those who have had the corona virus, have been tested for it, and have received the vaccine, with a simple scan.

While all this and Event 201 went on as well Bill Gate's interviews of "fears of pandemics", he was working with and helping fund Springer's Cancer NanoTechnology research; they released this study which proposes injecting those who are aging, have cancer, are depressed, suffer from anxiety or any other stress or neurotransmitter/hormonal-proposed imbalance-based disorders, with nanobots which will "sense" the discrepancies" and release the appropriate amount of (synthetic) neurotransmitters/hormones into the brain and bloodstream (google is not being my friend right now in finding the latest released article from their research, that study was from 2013). They also suggest the nanobots can detect developing disabilities or abnormalities in the body, such as cancer or HIV. The latest research they released though, suggested it'd be ready sometime before 2022, and suggested it'd be helpful for many people, but "maybe everyone should consider getting them as "preemptive strike". If I find it I will edit this comment and put it here. Articles were written about it too as a new possible frontier for depression treatment.

Bill Gates has his hands in a lot of things that involve augmenting humans, injecting them with things as well as monitoring and controlling them. And of course controlling their population.

Edit:

https://singularityhub.com/2016/09/18/mind-controlled-nanobots-used-to-release-chemicals-in-living-cockroaches/

Here's that article from Springer I couldn't find: https://jnanobiotechnology.biomedcentral.com/articles/10.1186/s12951-018-0392-8 - "Nano based drug delivery systems: recent developments and future prospects"

https://www.sciencedirect.com/book/9780128097175/nanotechnology-based-approaches-for-targeting-and-delivery-of-drugs-and-genes

We thought the effect SSRI's had on developing teenagers was bad? Man, sounds like you could literally cause a person to go insane from a remote location by causing a certain neurotransmitter or set of hormones to release in abundance, activating the amygdala while causing rage-filled hallucinations and delusions.