This doesn’t make sense. Brazil is hot and humid. The very conditions that are supposed to abate the virus activity this summer in the US.
Remember it’s winter there now, May to August, as they are in the southern hemisphere.
they are heading into their fall...so no. My guess is the humidity is falling off enough to allow for the virus to be airborn. Sao Paulo is only barely at 50% humidity today...with rain. https://weather.com/weather/tenday/l/S%C3%A3o+Paulo+S%C3%A3o+Paulo+Brazil?canonicalCityId=d7593e91d7e1447404d3a75fc1f7e0513bfcc5bdd74b81f6b4299f68b5689392
What humidity is needed to stop Covid-19? Well it depends on your cleanliness and air circulation.
We are going to see a second wave with minor outbreaks over the summer. So...be prepared for a long winter season.
Hot and humid sustains the virus. Dry and sunny would tend to denature it.