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Challenges of distributing Covid vaccine globally

With the spurt in news about the positive progress of the vaccine in various countries, we are entering a new phase in the Covid-19 saga. The world is beginning to concretise medical tools to fight the disease. Hitherto, the responses had been of a physical nature, like masking and social distancing.
Even if a bunch of vaccines are finalised by the last quarter of 2020, inoculating the entire global population will be an herculean task. It could take two to three years. Thus, the economic turbulence of 2020, could spill into 2021 and a part of 2022 also.
The most important challenge will be to build pipelines or channels of distribution from the five or six vaccine producing pharma companies, all based principally in the US and Europe, to every town and  village in the world. About seven billion people across countries have to be inoculated across the world. So the vaccines have to be packed appropriately, transported and delivered to the consumption centres, town and villages.
- Rajendra Aneja, Mumbai, India