As the world's COVID-19 cases spiked for the fifth week in a row, the World Health Organization (WHO) today said the vaccine gap between rich and poor countries continues to widen.At a briefing, the WHO's director said vaccine doses deployed in high-income countries are far outpacing doses administered through COVAX, a situation he said is "becoming more grotesque very day."The agency's stark assessment comes as concerns over vaccine safety and supply roil countries, especially in Europe, and comes on the same day AstraZeneca released promising findings on efficacy and safety from a US trial of the COVID-19 vaccine it developed with Oxford University.WHO appeals to countries, vaccine producersTedros Adhanom Ghebreyesus, PhD, the WHO's