To add to my previous comments:

Several of the parents of my children's friends have reported bad headaches and sore throats, which followed the prior instances of chemical trails and spraying, which were events that occurred about fourteen days ago (or so). These were not sinus headaches. There were similarities to allergic reactions.

But there were no fevers associated with these reactions, no abdominal or G.I. tract discomfort, just headaches, sore throats.

Of course this is anecdotal information, unscientifically taken from my friends and neighbors, who -- being good Americans -- are very much inclined to tell everyone who will listen about their aches, pains and not feeling good.