It's not a case of media hysteria driving social isolation; it's simple math.
It's been said that figures don't lie but liars figure. You can decide for yourself.
Sober Math and the Pandemic:
Currently, the number of confirmed sick folks doubles every three days.
Without social isolation (which some people see as a hysterical over reaction) you can assume most folks come in contact with at least 10 people during the course of their day.
It takes about five days or more for someone to become symptomatic and realise they may be sick with it.
Therefore each person who is sick, and doesn't know it, and is out and about, has the potential to transmit to 10 or more other people, who then go out and infect more folks.
And if you feel 10 people is too, high substitute 5 and the end result (below) will be just as sobering when you divide my result by 2.
To continue, take the number of confirmed cases and times it by 10 to get the number of potential carriers and now take that number and times it by 2 to the 10th power or 1024.
2 to the tenth gives a picture of how many sick people you'll have on day 30 with an infected population that doubles in size every three days.
On 3/19/2020, the Austin Texas American Statesman (daily newspaper) posted 41 known cases in Travis county.
You can use the current number of confirmed cases in your city, town, county, hamlet parish or country.
So if you take 41 x 10 .... 410 ... and then 410 x 1024 .... You get 419,840 infected folks by day 30.
Now assume only 15% will be seriously ill that means 62,976 needing hospitalization in Travis County Texas by day 30 if folks don't self isolate.
Yes, it's kinda grim if the numbers hold, and folks don't self-isolate now.