Can blood disinfect a house from plague according to Leviticus? We know blood is a good media of germs, bacteria, as well as toxin. But Leviticus, Ch. No.14, Verse No.49 to 53 - tells a way for disinfecting a house from plague of leprosy.

It states ‘Take two birds, kill one bird, take wood, scale it - and the other living bird, dip it in water and under running water - later on sprinkle the house 7 times with it. 
Does it work and how?
Edit: per above comment, see here: Is Leviticus 14 describing a cure for leprosy?

Leviticus 14:1-9


  14 And the Lord said to Moses,
  
  2 This shall be the law of the leper on the day when he is to be
  pronounced clean: he shall be brought to the priest [at a meeting
  place outside the camp];
  
  3 The priest shall go out of the camp [to meet him]; and [he] shall
  examine him, and if the disease is healed in the leper,
  
  4 Then the priest shall command to take for him who is to be cleansed
  two living clean birds and cedar wood and scarlet [material] and
  hyssop.
  
  5 And the priest shall command to kill one of the birds in an earthen
  vessel over fresh, running water.
  
  6 As for the living bird, he shall take it, the cedar wood, and the
  scarlet [material], and the hyssop, and shall dip them and the living
  bird in the blood of the bird killed over the running water;
  
  7 And he shall sprinkle [the blood] on him who is to be cleansed from
  the leprosy seven times and shall pronounce him clean, and shall let
  go the living bird into the open field.


This very likely has nothing to do with literal sanitation, but like many things of the law, its a reflection of heavenly things, heavenly benefits, and quite often the things involved are symbolisms * although the people of their day took it literal. 

Looking at verse 2-3 it appears this is a ritual  upon being pronounced clean - not on the cleansing itself. 

The law is a reflection of heavenly things:

Hebrews 8:5


  5 [But these offer] service [merely] as a pattern and as a
  foreshadowing of [what has its true existence and reality in] the
  heavenly sanctuary. For when Moses was about to erect the tabernacle,
  he was warned by God, saying, See to it that you make it all [exactly]
  according to the copy (the model) which was shown to you on the
  mountain.