By Emma DavisStaff writeredavis@oklahoman.comAs Oklahomans endure the current rise in COVID-19 cases, medical professionals recommend lifestyle changes now that will boost their immune systems for the fall and winter months that usually see high numbers in flu and, this year, possibly increasing numbers of virus patients. A healthier lifestyle with a proper diet and exercise regimen can improve immune system health. Del City pediatrician Dr.Read more on NewsOK.com