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Anonymous
TCID=Tissue Culture Infectious Dose
TCID 50 means in tissue culture a certain virus will infect 50% of the cell monolayers challenged with the defined inoculum
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It is a 'Training Contract Identification Number' or TCID.
what is the mean of 50, 0.6
If you mean what is, 250,000,000.
It could mean 20000 + 50 = 20050
50