Maybe a break in the case numbers?
We (USA) were following a Delta wave curve like the UK - up tenfold in about two months, then dropping in half, and rising slowly from there.
Our recent downturn might mark a break from that pattern (Delta burning out), or it might just be some temporary fluctuation.
Between Delta, and now Omnicron, COVID is well on its way to burning through the great bulk of the remaining available fuel this Winter.
The fuel gets replenished every day of eroding vax protection.
Take a look at India, where Delta had originated. The population is much younger (and thinner) than the U.S. So my educated guess is that when it burned through the population, it had infected everyone and a lot of their elderly (their percentage of the population is much lower than ours) died in the surge. But it was only really bad in India for around three months so they got through it relatively quickly.
Our population is much older and more spread out so it's going to take a while for the fuel to burn out. Just my .02