Thunderstorm Asthma! What is in These Chemtrails?

First time I have heard of this "thunderstorm asthma"
Because of it 6 people are dead and upwards of 8,500 were hospitalized last week

You won't find anything about this on Google News Australia.
Type in 'asthma' though and hold your breath.
Entry after entry on the topic 'thunderstorm asthma'

The Sydney Morning Herald reported that at the peak of this “thunderstorm asthma” outbreak, people were calling for an ambulance one every 4.5 seconds and “it was like 150 bombs going off”:

“When we’ve had people calling for ambulances – one call every 4½ seconds at the peak – it was like having 150 bombs going off right across a particular part of metropolitan Melbourne.

And that’s something we’ve never really planned for.”

The 'official' story talks about pollen grains releasing tiny allergen nanoparticles that got trapped in peoples lungs.

Once the rain stopped, thousands of people began suffering asthma symptoms all at once, everything from breathing issues to cardiac problems.

Some people suffered heart attacks. Six people have died so far.
The system was completely overloaded.
Apparently in Melbourne they ran out of ambulances and had to resort to every other emergency and even non-emergency vehicles they could find to help get people to the hospital.
More than 60 people are still in the hospital, some in critical condition fighting for their lives.

Lets see now, wintery conditions, gloomy looking clouds, proceeded by days of 'chemtrails' especially just ahead of the storm front.
Do I hear the word conspiracy?