It's more like skydiving downwards this year. It's no comparison to last year. And there was another skydiving type of drop in cases starting about January 10:
Of course infections may increase in colder weather when more people are indoors in poorly ventilated spaces that are considered 20X more dangerous than being outdoors. Scientists have already predicted that possibility. Your analysis ignores places that don't have a winter like Canada does, e.g. Israel, Texas, etc.
"A Brazilian town has seen a 95% drop in Covid-19 deaths after almost all adults were vaccinated as part of an experiment, researchers say.
Serrana, with 45,000 inhabitants, saw cases plunge after a mass vaccination with the Chinese-developed CoronaVac.
The team said those who had not been vaccinated were also protected by the reduction in the virus's circulation.
The findings suggest the pandemic can be controlled after 75% of people are fully dosed.
Brazil has been hit hard by the pandemic, with nearly 463,000 deaths.
An experiment in Brazil suggests the pandemic can be controlled after 75% of people are fully dosed.
www.bbc.com