"Synthia" could be one. [link to www.nytimes.com]

On May 14, a 55 gallon barrel washed up on the beach in Hollywood, Florida. Nobody knows where it came from, or what was in it, just that it began smoking when it was cracked open. HazMat blew it up. [link to www.miamiherald.com]

Two days later, 12 students and 2 teachers at MacArthur High School, just a few miles away, developed a mysterious rash. The cause is still unknown. [link to miami.cbslocal.com]

A week later, (May 23), another Broward County school (Lauderdale Lakes Middle School) had an outbreak of unexplained rashes; 4 students and 1 teacher involved this time. [link to www.miamiherald.com]

The night before the Miami attack, Rudy Eugene spent the night with his girlfriend in Miami Gardens, only a few miles from MacArthur High School; she said he was acting strange even the night before the attack. [link to miami.cbslocal.com]

If you'll notice, these are all reputable sources for all of these facts.

So we have a synthetic bacteria made by the company that produces bacteria that eats oil spills.
We have an unidentified substance blown up on a beach.
We have unexplained mystery rashes in two Miami schools.
We have a guy who spends the night close to one of the schools and goes zombie on someone the next day.

A little over a week later, we have someone who bites a chunk out of someone's face west and a little north of where all this happened...

Draw your own conclusions.