How contagious is measles and how is it spread?
A friend of mine is living with someone who might have just got measles (results pending). If true, and my friend has also got it, how contagious is it? I think it is measles, rather than German measles, which I had as a child. Does past illness provide any defense? That is, can you get it twice? I presume having had German measles does not provide any protection against measles.
How is it transmitted? Like a cold? (Physical contact, common contact with hard surfaces, and maybe airborne?)