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   across      around      at      by      for      for      for      for      from      in      in      of      of      of      of      of      of      throughout  
Whenever scientists create a vaccine COVID-19, governments worldwide will be scrambling cargo aircraft. Distributing the vaccine will be one the biggest logistical operations ever. Aviation experts have forecast that transporting the vaccine the globe will require 8,000 747 freight planes. This is sufficient to ship 7.8 billion doses any vaccine - one dose everyone on Earth. The International Air Transport Association (IATA) has warned governments they must start planning the "mission of the century". It said: "Even if we assume that half the needed vaccines can be transported land, the air cargo industry will still face its largest single transport challenge ever."

IATA has warned governments that many obstacles must be overcome to ensure the effective distribution a vaccine. One critical element this is the creation temperature-controlled cargo hubs and warehouses. It is essential the vaccine be kept the same temperature its journey. This would require extensive training staff worldwide, who must quickly become expert safely handling and moving the vaccine. IATA said a further challenge would be security and cross-border controls. It said: "Vaccines will be highly valuable commodities. Arrangements must be place to ensure that shipments remain secure tampering and theft."

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