Yep, bio warfare without costing more than some plane tickets. Bio warfare like this (not saying this guy is, but as an example of simple bio terror) has been going on for centuries if not thousands of years. Example, Revolutionary War and smallpox. Brits infected Revolutionary troops.
“...There is no proof that anyone attempted to spread disease among the enemy troops during the American Revolutionary War, but there is a plenitude of circumstantial evidence. Almost from the beginning, Americans suspected the British were trying to infect their army with smallpox. Just before Virginia’s last royal governor, Lord Dunmore, departed from his base at Norfolk in 1776, the Virginia Gazette reported that his lordship had infected two slaves who had joined his forces and sent them ashore in order to spread smallpox, “but it was happily prevented.”
Report of failed smallpox plan
The Virginia Gazette reported the failed smallpox plot of Lord Dunmore.
Most British troops had been inoculated or had had the smallpox and were immune. In Europe smallpox was endemic, almost always present. Nearly everyone had been exposed to the disease from an early age, so most of the adult population had antibodies that protected it.
Most American soldiers, on the other hand, were susceptible. Because of less dense population, Americans often reached adulthood without coming into contact with the smallpox virus, and had no immunity. Some suffered inoculation, a procedure which usually produced a milder infection, but laid low the patient for days. George Washington faced a dilemma. If he ordered the general inoculation of the army, that would put most of his troops in the hospital at the same timea certain disaster if the British learned of it.
Washington tried to get around the problem by ordering all new recruits who had not experienced the disease to be inoculated before they were sent to the main army. Hospitals were set up to undertake the work. Even with his precautions, at one time about one-third of the army was incapacitated with either the disease or the inoculation. ...”
http://www.history.org/Foundation/journal/Spring04/warfare.cfm
One person in a state like Florida goes to Disney World for 2 days where people from all over the US and the rest of the world could infect enough people to take MERS back to most points in the world to infect people who infect others who infect others.