There have been questions about whether or not the CDC (Center for Disease Control) recognizes MCS.
Their Indoor Environmental Quality Policy from 2009 explicitly states:
“Fragrance is not appropriate for a professional work environment, and the use of some products with fragrance may be detrimental to the health of workers with chemical sensitivities, allergies, asthma, and chronic headaches/migraines.” …
Potential hazards include chemicals, biological agents, fragrant products, and physical conditions that may cause irritation, illness, or exacerbate existing health conditions.
Here are a few more excerpts:
Seriously "Sensitive" to Pollution 