>>>if you come across more info on hemispheric differences, pls. mention
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>There's another local distinction: age. Locally there's a much lower age profile attributed to the higher proportion of infection in recent international arrivals and their contacts. Younger people are more likely to recover, even to be asymptomatic as could be the case in 80% of younger people. Contrast with Italy with more significant community spread affecting older age groups.

Aware of age: here wondering what protects Japan vs. Italy, as both have more elderly than other nations.

If no vaccine is found and numbers from summer in Europe also support seasonal difference in symptom strength, I might visit Australia, New Zealand or South Africa for a longer time if summer here is definatly over. Teleworking from Winter Quarantene or entry Quarantene will be not that different ;-)