the total population is fully vaccinated. in africa around 4% of the total population of that continent has been fully vaccinated. africa has the lowest vaccination rate of any continent. the five african countries with the lowest vaccination rates are the democratic republic of congo, tanzania, chad, south sudan, all with less than 1% of their population fully vaccinated. president biden has made the united states the world's leader in distributing free vaccine to other countries. joining us now is the director of the office of global affairs at the department of health and human services. thank you very much for joining us tonight. what are some of the challenges you're facing in actually getting these vaccines delivered especially to countries where refrigeration is a challenge for the pfizer vaccine and where they not only don't have refrigeration but don't have generators to power it. is there some infrastructure