Both saw early cases and then seemed to see things level off. Some suggested it was the sensitivity to heat and humidity plus, for Singapore, quick and decisive actions to limit the spread.
Both are now looking almost like they are at the start of their outbreak.
Any clues as to why or if this largely refutes the seasonal claims (not sure about Singapore but Philippines is officially in Summer season).
I don't find that a credible explanation.
First, the medical centers, particularly in the major cities are not that bad. They would have noticed.
Second, there is enough political fighting that if the administration was attempting to suppress the reporting Duarte's political enemies in both government and media would have been getting the leaked to both news and social media if the doctors were not doing it themselves.
The only thing that I can think of for the Philippines is that all the infections and deaths were perhaps misidentified as dengue but if that were the case I would think there would have been a bit more about how bad the disease was this year. I've not seen that claimed anywhere.