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Nihilists suggest that there could come a point at which bacteria retake the upper hand, and doctors, as in previous centuries, have no answer to some bacterial infections.
Experts believe the virus is rare and only found in Africa. Meningococcal meningitis, caused by the bacterium Neisseria meningitidis, is the most common in the UK and the source of most recent reports.
The simple form is not usually disabling, but the complicated form usually does lead to disability. The characteristic rash described above is actually a sign of septicaemia.
Fertility doctors are worried at what they see as an unwanted side effect of IVF.