POLITICO Get the POLITICO Nightly newsletter Email Sign Up By signing up you agree to receive email newsletters or updates from POLITICO and you agree to our privacy policy and terms of service. You can unsubscribe at any time and you can contact us here. This sign-up form is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. With help from Myah Ward BRITISH INVASION — This isn’t the first time the Covid-19 virus has mutated. In February, the virus strain that spread in Europe had more than a dozen mutations to the spike protein, which the virus uses to enter cells. It’s highly contagious and quickly became the dominant form of Covid.