Just read this interesting article about "paper planning" of a pandemic flu.

From that article:
"The three-week scenario compresses the 12-week period a pandemic wave would likely last. Among the other things that may happen in an actual pandemic are school closings, as well as blackouts or brownouts in major metro areas because of degraded service as a result of absenteeism. Internet service throughput could be reduced by 50% due to congestion, and Web browsing timeouts would become common. Airlines would cut schedules, and garbage would pile up on streets.

Many frustrations would arise. Working ATMs might be scarce, and call centers may not have enough staff to help. Health insurance claim volume would rise 20%. Auto claims are expected to fall 10%, since there would be less traffic on the road. But for those who are driving, gas prices would be high and fuel supplies reduced."