As you've probably heard by now, on Wednesday, Amazon.com (NASDAQ: AMZN) sent a letter to new U.S. President Joe Biden offering "to assist you in reaching your goal of vaccinating 100 million Americans in the first 100 days of your administration." On the one hand, the company highlighted its "over 800,000 employees in the United States, most of whom are essential workers" as a great place to start vaccinating. At the same time, with 800,000 workers at its disposal, a vast logistics network, and a host of retail and warehouse properties to work from, Amazon said it was "prepared to move quickly" to help distribute vaccines. Today, Walmart (NYSE: WMT) raised its hand and declared it could do the same. Image source: Walmart. The headline of Walmart's blog post from its executive vice president for health and wellness, Dr. Cheryl Pegus, basically said it all: "When Vaccines Roll Out in the U.S., Walmart Stands Ready to Serve." "Over the past year," says the company, it has been training "thousands of pharmacists and pharmacy techs" at its "more than 5,000 pharmacies in the U.S. and Puerto Rico" to begin administering vaccines. Once vaccines begin arriving, "at full capacity," Walmart says "we expect we will be able to deliver 10-13 million doses per month," running vaccinations "seven days a week at our pharmacies" -- and in particular, in "federally designated medically underserved areas." Amazon may be the king of e-tail and package delivery, but "with 150 million people passing through our doors each week," Walmart is reminding the government that it is "in a unique position to reach people where they already shop." Investors seem to be betting the government will take Walmart up on its offer. On a down day for the stock market, Walmart stock is up more than 1%. 10 stocks we like better than Walmart Inc.When investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Walmart Inc. wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of November 20, 2020 John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool's board of directors. Rich Smith has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Amazon and recommends the following options: long January 2022 $1920 calls on Amazon and short January 2022 $1940 calls on Amazon. The Motley Fool has a disclosure policy.Source