Overall, 33% of Australians report health problems, such as migraine headaches and asthma attacks, when exposed to fragranced products. Of these health effects, more than half (17.1%) could be considered disabling under the Australian Disability Discrimination Act.
Steinemann, A. (2017). Health and societal effects from exposure to fragranced consumer products. Preventive Medicine Reports, 5, pp.45-47.
Full article (free): https://www.sciencedirect.com/science/article/pii/S2211335516301449