Doing This Over Christmas Could Have 'Catastrophic Impacts,' Doctor Warns By Zachary Mack of Best Life | Doing This Over Christmas Could Have 'Catastrophic Impacts,' Doctor Warns This year, the usual joy that makes the holidays so memorable and bright is a lot harder to find amid a pandemic that continues to worsen with each passing day. And for millions of people left deciding how they will celebrate, medical experts are warning that making a sentimental decision could have serious consequences. Gathering in large groups or traveling this Christmas could have "catastrophic impacts" on the next few months of the pandemic, one doctor is warning.