By Veronika Bondarenko The retail giant has been opening centers for primary care, labs, X-ray, behavioral health, dental and optical services since 2019. Even before the pandemic, Walmart (WMT) – Get Walmart Inc. Report has been on a steadfast mission to make its dent on the health-care space. A 10,000-square-foot space offering primary medical services, dental care and behavioral health services, the first “Walmart Health” center opened in Dallas, Georgia, in September 2019. A few months before, it had announced plans to acquire telehealth company MeMD and, by 2021, became a major provider o…