The new strain of COVID-19 is showing to be more contagious but not more deadly. Dr. Sudha Nagalingam is the medical director for El Rio's HIV and Infectious Disease Clinic. Nagalingam said there are 23 different mutations in the COVID-19 virus. She told News 4 Tucson there is only one mutation that sticks out. "It has shown t be a little more contagious and it does not show more illness or fatality," Nagalingham said. "It's something we should be keeping the eye on and other virus infections like influenza, that is when mutations occur and it will impair the body differently." The information out of the UK and these changes are prompting questions, wondering if the Pfizer vaccine and Moderna vaccine become ineffective with more mutations?