Christine Callander, a family nurse practitioner and the founder of Pure Health Texas, joined The WBAP Morning News. Temperatures go down, and COVID cases go up. Get ready for more sickness. Covid-19 is settling in as a wintertime fixture, and infections are expected to rise again as the weather cools and holiday gatherings pile up. The virus is on a collision course with the seasonal scourges of flu and respiratory syncytial virus, or RSV, which are circulating again after the pandemic disrupted their spread.