Lots of reasons:
- The skiing youth got it first. They are not as good a figures as they were a week ago.
- Lots of testing to actual cases (reduces mortality %)
- Lots of ventilators
- Using remdesivir antivirals (they bought a big stockpile last year).
- Traditional use of Medical Ozone gas (Oxygen with 0.5 ppm Ozone) for fighting viral pneumonia.
- Tradition use of Ozone therapy to boost immune system in ill patients. (e.g you bubble Ozone through olive oil and rub the ozone into the body).
Population concentrations in the worst affected areas must have a big impact also. Spreads quicker and less able to then deal with it. Compare Germany to the Netherlands for the closet comparison.
Like you say the verification of actual cases is probably the biggest factor.