vaccinations to the stamp of disease fitting of the world have come a long way since 16-century Chinese mums south to immune peoples from small pores by grinding skeletons from scabs on the sick and blowing it up the nostrils of the healthy.As the world grappled with the latest pandemic to rage across it, causing 2.5 million deaths so far, governments, private investors, and philanthropic organizations have poured billions of dollars into the search for a vaccine and it development in record time.The goal of any vaccine is to create what is known as herd immunity, where enough people have either had the virus of the vaccine, reckoned by some to be 80% of the population, so the virus has nowhere else to go it left unchecked, the virus mutates into other forms to attack people's immune systems.With developed countries jumping in early to buy up supplies of the half dozen vaccine available, not all of them approved by international authorities, developing countries have largely been left behind, and many are struggling to cope with the disease.
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