Colorized scanning electron micrograph of a cell (blue) heavily infected with SARS-CoV-2 virus particles (red), isolated from a patient sample.
Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland. (IMAGE POINT FR/NIH/NIAID/BSIP/Universal Images Group via Getty Images)The potential new head of the Centers for Disease Control and Prevention has cautioned that at least one new coronavirus strain has shown resistance to treatments, but insists the vaccines are still effective.A number of new COVID-19 strains have arisen over the past month, stirring concern that current treatments and vaccines will not be effective.