Operation Dark Winter was an outbreak exercise in June 22-23, 2001 simulating a covert small pox attack on the US. This was one of several John Hopkins tabletop simulations of Operation Lockstep. During the third presidential debate on Oct. 22, 2020, Biden says in response to question about the pandemic, "We're about to go into a dark winter... A dark winter".
LINK. The other pandemic exercises were Atlantic Storm, Clade X and finally Event 201 with Bill and Melinda Gates Foundation and the WEF on Oct 18, 2019. The pdf of the original Operation Dark Winter has been scrubbed from the web but I had a printed copy and the PTB followed it to the letter... down to travel restrictions, deploying military assets, suspension of civil rights and punishment for disinformation. Even the last exercise, Event 201 is the international recognized date for their planned release, year/month, 2020/Jan. This was a highly organized attempt to use a man-made virus to take over the world and kill a lot of useless eaters. They aren't done yet, so prepare accordingly.