The Crazies

An event which happens before the film starts, but effects later events is when the plane crashes in the water - and the plane has the virus in it; which causes the outbreak.

Another event which happens is when Judy is pregnant, which effects later on in the film because Judy is placed in a different place by the Government because she is pregnant.

An event which happens in a different time to the one we are shown is at the beginning of the film, where we see what happens to the town at the end of the film