Around 1.3 billion people worldwide said that they will not get a COVID-19 vaccine if it became available at no cost, according to a Gallup poll taken in the last six months of 2020 and released Monday. The 1.3 billion was a combination of 29 percent, or around three in 10 adults, worldwide who refused to be vaccinated, and another 3 percent who were undecided or refused to answer. The rollout of the vaccines may be more challenging in certain countries, where more than 50 percent of people in 20 countries and areas said that they were unwilling to receive a COVID-19 vaccine. These countries are Gabon, Cameroon, Jordan, Hungary, Bulgaria, Bosnia and Herzegovina, Russia, Kazakhstan, Kosovo, Senegal, Togo, Cyprus, Czech Republic, North Macedonia, Albania, Poland, Namibia, Lebanon, and Ukraine. Less than 2 percent of the population in eight of the countries have been vaccinated against COVID-19. Sub-Saharan African countries …