Historical cancellation data

[unawareandcompliant]

this sensationalist site is saying that cancellations are up 580% over average due to pilots ill from covid vax. i find that hard to believe

https://thecoloradoherald.com/2021/thousands-of-flights-cancelled-as-vaccinated-pilots-fall-ill-or-die/

certainly there are other factors that result in surges in cancellations like this, right? how do i see historical data

thanks

[obj]

For recent history there is:

https://flightaware.com/miserymap/
https://flightaware.com/live/cancelled