With vaccines comes the promise of light at the end of tunnel. That said, it is always safer to manage expectations.  As the UK returns to its strictest lockdown since the spring, as Germany and France extend confinement measures, the whole world is watching new strains of COVID-19 out of England and South Africa. Will vaccines be enough? Do new variants mean that humanity has to learn to live with coronaviruses? What future for infectious diseases in a globalised world? 

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