Covid19 is genuinely unpredictable. It will spare a country/region and then suddenly reappear in full rage. For almost a year it seemed that East & SE Asia had controlled it, but now Japan is witnessing spiralling numbers 1/n 
If you are trying to correlate this spike to temperature/winter, note that same spike is happening in Malaysia that is near the equator and barely sees any seasonal variation. Indonesia is also seeing an acceleration 2/n
Meanwhile, Vietnam is going about life as if nothing happened. Please don't try to argue that this is due to Vietnamese self discipline. Try crossing a road in HCM and you will know what I mean (much crazier than Delhi).
We witnessed this in Europe as well. The virus initially spared Germany, and then it spread like wildfire across the country. Lesson: Past success if no guarantee of future performance. Vaccination is perhaps the only real solution. 4/n
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