HS asked Vantaa’s infection tracking to see one of the delta transformation chains this summer. It can be seen why tracing is now in near chaos in big cities.
In midsummer the corona epidemic seemed to ease. Restrictions had been relaxed. Five Vantaa-based friends went abroad.
The trip ended in bad news: four out of five were diagnosed with coronavirus infection. It was a fragile delta transformation. The chain was eventually halted – but the virus had time to spread far and wide in various encounters, even to another hospital district.