.. and (but I realise this is hindsight) > almost invariably in rural villages that had already endured months of a severe drought You'd think to look for nut

.. and (but I realise this is hindsight) > almost invariably in rural villages that had already endured months of a severe drought You'd think to look for nutritional reasons in a drought, not infections or viruses, which, afaik, tend to be associated with water.