Gaza is experiencing a health "catastrophe" that will last for "generations to come", the director-general of the World Health Organization (WHO) has warned. Dr Tedros Adhanom Ghebreyesus told BBC Radio 4's Today programme that a massive increase in aid is needed to begin to address the complex needs of the Strip's population. Israel has allowed more medical supplies and other aid to cross into Gaza since a ceasefire with Hamas came into effect on 10 October, but Dr Tedros said levels are below