said by ISurfTooMuch:Not to mention the fact that the increase in cell-only households presents other issues in disease control. Suppose you have a serious outbreak that requires immediate notification of all residents in an area. When everyone had landlines, you could call all numbers in a given group of exchanges and be pretty sure you'd reached everyone. With cells, people often move and keep their old number, which may be from an area across the country. How much of an issue is that, and how do you deal with it? That's something the CDC needs to find out.
With cellphones, that's even easier. Just broadcast a text message to everyone within range of cell towers in the affected area. That way, even folks who are just visiting will get the message. GSM phones already have the capability to receive localized broadcast messages, I can't imagine CDMA doesn't have a comparable capability.