I assume you mean in the pool water.
You want to shock your water up to the recommended shock level for your level of stabilizer (CYA).
I suggest you keep it there for 24-48 hours, to see if the FC stays high AND to ensure you have a CC level of 0.
Essentially, you want to follow the same procedure as for fecal matter in the pool.
If someone has a better or more specific rec, please post it.
Blood on the deck, etc. can be cleaned up with bleach.

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) When I told them about a suspected contamination in my pool a few years ago, and explained that with a CYA level of 60 I ran my FC up to 30 ppm and held it there for 2 weeks, they all laughed and assured me that my pool was probably the cleanest place there was in the parish, and that none of them would have any problem swimming in it. Granted, it was overkill--they each pointed out that therapy pools in the hospitals have any number of diseased people in them throughout a given week....and nothing special is done to decontaminate, except to maintain a 3 ppm chlorine level on an inside pool.

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