Data: The COVID Tracking Project; Chart: Andrew Witherspoon/AxiosMany of America's COVID-19 spikes came on the heels of holidays, when friends and families gathered to celebrate. Could Super Bowl LV lead to another spike?Parties: 25% of Americans said they planned to attend Super Bowl parties with people from outside their households, per a Seton Hall Sports Poll.Celebrations: Thousands of fans celebrated throughout the night in the streets of Tampa, many of them without masks.Support safe, smart, sane journalism. Sign up for Axios Newsletters here. Photo: Chandan Khanna/AFP via Getty ImagesRewind: The 49ers' loss to the Chiefs in last year's Super Bowl may have prevented the spread of the virus, per WSJ (subscription).Celebrations would have been held if they'd won, and COVID-19 was already spreading in the Bay Area at the time. It didn't reach Kansas City until March.Be smart: sign up FREE for the most influential newsletter in America.