Dr Magda Campins – chair of Catalonia's Covid-19 Scientific Advisory Committee and head of Preventive Medicine and Epidemiology at Vall d'Hebron Hospital in Barcelona – on the Omicron variant, booster shots and why Christmas office parties should be avoided. Lorcan Doherty, Cristina Tomàs White and Guifré Jordan discuss the profile of a sixth wave patient, the latest travel rules, and FAQs from residents and tourists on the use of Covid certificates in cafes, bars and restaurants. This week's Catalan phrase is 'cada dos per tres'. It means something that happens very frequently.