Just as demand for the COVID-19 vaccine has dropped, it has become easier to get the shot if you want one. Vaccine access has expanded from government-run sites to big-box stores and retail pharmacies, many of which are no longer requiring appointments. This week, all Walmart and Sam's Club pharmacies in Florida began administering vaccines on a walk-in basis. Stores are offering the Pfizer, Moderna, or Johnson & Johnson vaccines, depending on supply. At Sam's Club, a membership isn't required to get the shot. "Widespread vaccination is the only way we will eventually end the pandemic and help our country reopen, and we don't want anyone to get left behind as we enter this new chapter in our fight against COVID-19," Dr. Cheryl Pegus, Walmart's executive vice president of health and wellness, said in a statement.