blog postsA post-holiday COVID-19 surge? Not yet, but experts still waryJan 20, 2021 2:00 pm by Chicago TribuneIllinois in the NewsShare on FacebookTweetEmailImagesChicago Tribune (Jan. 18) 'Holiday spikes are important, but what keeps me up at night is a different question: Did holiday socializing spread the (new strain)?” says Illinois professor Nigel GoldenfeldShare on FacebookTweetEmail