The exploration of the chiasm and retrochiasmal visual pathways relies on magnetic resonance imaging. If a lesion of the optic chiasm is suspected, the millimetric acquisitions in T2 and T1 weighting with and without contrast infusion are carried out in the three planes.
There are two vaccines available in the UK-an oral vaccine and an injectable vaccine. Both vaccines stimulate your body to make antibodies against typhoid germs (bacteria). These antibodies protect you from illness should you become infected with typhoid bacteria.
The first vaccine is administered at infancy. The baby is injected with the DTaP vaccine which is 3 inactive toxins in one injection. DTaP protects against diphtheria, pertussis, and tetanus. This vaccine is safer than the previously used DTP.