“Yes, one day the dearest, the most beloved will be taken from our side, and death is not the worst that can befall us. There are trials which are harder to bear because they do not come to us straight from God, but from, it may be, the sins of man.”
Ethel Romanes, 1902.
Against organisms of other species (e.g. bacteria) we have barriers, which are both external (e.g. personal hygiene), and internal (e.g. the immune response). The preceding chapter outlined the