Forget what you read online about it. While there's some social pressure to wear a mask, Mexico knows that it cannot afford to lock down. They tried to lock down and failed. Merchants appreciate your business, knowing that your purchase means your support. The cartels seem to have calmed down. Sometimes you need a fig leaf such as a dental appointment or an unfilled prescription to cross the border, but that's it. Fine restaurants, natural attractions such as the Obispado peak and Chipinique are open and await you. Prices are bargain basement for lack of customers. As a US citizen, you have the right to re-enter the US. When US Customs asked the purpose of my visit, I replied "For the Hell of it." They put my backpack through an X-Ray and said "Have a nice day." A respite awaits you!