Thread by @Poppendieck

#indoorair2022. @CathNoakes. Plenary. Breathe is a jet for 30-50 cm, then rises due to temperature, then starts to mix through turbulence. Aerosol production goes up breathe>sing>cough. BUT orders of magnitude differences between people. 1/

Respiratory aerosols are liquids that evaporate over time. Impacts virus viability and aerosol size. Aerosols 20-100 microns get smaller fast and concentrate high concentrations of virus. Variation of size and virus numbers can vary 4-5 orders of magnitude. 2/

Fomites also can have orders of magnitudes of dose. People are not stationary, we move around. But also with wide variability in our rates of interactions with other people. Does/response have orders of magnitudes differences for all aerosol diseases. 3/

Communication issues. Policy makers want magic bullets and simple messages. Need to find better ways to distill down complex messages to public. One way is cost benefit ratios (i.e. for ventilation). 4/

Collaborative working across disciplines is key to solving future challenges (YES!) 5/