The cover of Biochemistry (IMAGE) University of Colorado Anschutz Medical Campus Caption The cover of Biochemistry. Convergent evolution of multiple mutations enhances SARS-CoV-2 viral fitness by balancing positive and negative selection and improves the chances of selection of mutations together Credit Biochemistry Usage Restrictions N/A License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.