CVS Health and Walgreens are limiting the number of at-home COVID-19 testing kits that customers can purchase following “unprecedented” holiday demand for them. The two largest pharmaceutical chain stores in the United States announced the move in separate statements this week, just days before Christmas. “Due to the incredible demand for at-home rapid testing, we put in effect a four-item purchase limit on at-home COVID-19 testing products in our stores and digital properties in an effort to help improve inventory while we continue to work diligently with our supplier partners to best meet customer demands,” Walgreens said. “We refer you to manufacturers for questions on supply of individual products.” A Walgreens spokeswoman told The Washington Post, “As the nation experiences a surge in COVID-19 cases coinciding with the holidays, we are seeing unprecedented demand for testing services.” Meanwhile, CVS Health, in a statement shared with Nexstar said it is also imposing a limit on how …