Interesting the increase in covid 19 during cop 26 was in primary aged children, not cop attendees.
Although the 7-day incidence rate of infection in Scotland began to increase during the COP26 summit, from 330 cases per 100,000 on 1 November to 389 cases per 100,000 on 13 November, this increase was primarily driven by rising cases among children between 5 and 11 years old. In the final week of COP26, case rates rose in the adult population aged 20 to 49 years old also, but stabilised and started to decline in the two weeks after COP26 alongside the rates amongst the younger age groups.