I haven't seen any freaking out either, but production is not "...going on like business as usual". I cancelled both my shoots this weekend, and am not planning on shooting again until it seems safe to do so--which seems merely prudent. I know a lot of other producers aren't shooting until the smoke clears.
I did some reading about syphillis (here:
http://www.cdc.gov/std/syphilis/stdfact-syphilis.htm) and one thing that does concern me was this, "The time between infection with syphilis and the start of the first symptom can range from 10 to 90 days (average 21 days)." So what does that mean in terms of testing? If someone who worked with a syphillis positive performer a week ago, and tests clean tomorrow, does that mean they really are clean? Or should there be some quarantine period before retesting, and if so, how long should it be?