Did Omicron spread less in the parts of the U.S. where social distancing and masking were more common? The answer is surprisingly unclear. Nationwide, the number of official Covid cases has recently been somewhat higher in heavily Democratic areas than Republican areas, according to The Times's data. That comparison doesn't fully answer the question, though, because Democratic areas were also conducting more tests, and the percentage of positive tests tended to be somewhat higher in Republican areas. No single statistic offers a definitive answer. Over the past three months, the death rate in counties that Donald Trump won in a landslide has been more than twice as high as the rate in counties that Joe Biden won in a landslide. Interventions other than vaccination " like masking and distancing " are less powerful than we might wish. Although masks reduce the chances of transmission in any individual encounter, Omicron is so contagious that it can overwhelm the individual effect. There is a strong argument for continuing to remove other restrictions, and returning to normal life, now that Omicron caseloads have fallen 95 percent from their peak. If those restrictions were costless, then their small benefits might still be worth it. But of course they do have costs. Masks hamper people's ability to communicate, verbally and otherwise. Social distancing leads to the isolation and disruption that have fed so many problems over the past two years " mental health troubles ... and more.