You can see the leopard print pattern in the petri dish where the phage have been making light work of a bacterial infection that modern medicine was struggling to shift.

Strains of Staph. aureus may be somewhat more resistant, but concentrations two to two hundred times those needed for bactericidal effect are easily obtained clinically.

Treating a stye requires a light-handed approach. We spoke with experts about how to do so at home along with tips and products you can use to prevent them in the first place.