Half of the secret of resistance to disease is cleanliness; the other half is dirtiness.



Half of the secret of resistance to disease is cleanliness; the other half is dirtiness.

Half of the secret of resistance to disease is cleanliness; the other half is dirtiness.

Half of the secret of resistance to disease is cleanliness; the other half is dirtiness.

Half of the secret of resistance to disease is cleanliness; the other half is dirtiness.