If you had to kill one person to save the world from the next global pandemic, will you do it?

[DaaQ]

No one except you knows about Patient Zero. None would believe you even if you tried to warn the others, the government etc. about patient zero. The pandemic that will be unleashed by Patient Zero will be catastrophic. It is upto you and only you. Only you can prevent this catastrophe by killing Patient Zero. Will you do it?

Note: Patient Zero is an innocent person who committed no fault whatsoever, but unfortunately refuses to believe he/she is infected.

But how do you KNOW it's patient zero?

Are we talking like Jimbo from Contagion? or some other scenario? like Resident Evil?