1 in 5000 people who get measles will die.
The "uncommon" (for medication side effects "uncommon" means between 1 in 100 and 1 in 1000 people get the side effect; "rare" means that between 1 in 1,000 and 1 in 10,000 people are affected and "very rare" means that fewer than one in 10,000 people are affected -- I don't know if this is the same for disease complications).
Uncommon:
liver infection (hepatitis)
misalignment of the eyes (squint), if the virus affects the nerves and muscles of the eye
*infection of the membranes surrounding the brain and spinal cord (meningitis) and infection of the brain itself (encephalitis)
These seem pretty severe, especially since they're mostly avoidable.
EDIT:
> possible that some of the guests could be people from countries which don't vaccinate for measles?
Which countries would they be? Measles immunisation covers 80% of children under 1 year old.
http://www.who.int/immunization/programmes_systems/en/
> assuming that the strain of the current measles outbreak is the same one prevented by the vaccine
Are you saying the Edmonson strain doesn't protect against current strains? Or are you making shit up?
The magic number you are looking for is 95%.
http://www.latimes.com/local/california/la-me-measles-spread...
You may be surprised to learn that Disney etc may have thought of the source and method of spreading of this particular outbreak.
The most fundamental problem with our healthcare system is that we all know that pharmaceutical companies primary goal is to make bank, so we can't trust them.
Do you grow your own food? Make your own clothes? Did you assemble your car yourself from materials you created using your own steel mill and other such basic materials manufacturing plants? You trust private companies every day, every one of which happily states that they want to make money. What's so special about medicines?
This is something I use to wonder about. Isn't it more important that the food we eat be free of harmful toxins (like pesticides or harmful fertilizers?), but there is no agency that is responsible for checking the quality of vegetables or meat (At least here in India). There was an big issue with pesticides (Endosulfan)[1], in my state some time back. But still no government agency bothers to check for vegetables that are being sold to the public. No one bothers to check meat and fish for harmful levels of antibiotics or harmful chemicals.
So my question is, why are not governments spending any effort on this regards, while spending so much money of immunization. Combine with the fact that there is rampant corruption in every level of government, general poor quality of drugs sold in India, past proven incidents with pharmaceutical companies malpractices like faking results of medicine trials, is it too much if I think twice about giving an immunization drug to my kids?
[1]http://www.theecologist.org/News/news_analysis/1189820/revea...