The last week of April was the World Immunization Week. Agencies such as the World Health Organization, the United Nations Children’s Fund and the Global Alliance for Vaccines and Immunization joined on 24 April in calling for “biging” actions to reverse the decline in child vaccination coverage in recent years. According to information published on the WHO website, basic immunization levels have declined in over 100 countries since the new coronary epidemic. In 2021 alone, at least 25 millio...