Pfizer is one of the world's largest pharmaceutical companies. Developing its COVID-19 vaccine is a costly, uncertain and complex process. This company would need to consider which parts of the vertical chain to outsource and which to conduct inhouse. Using the theory of the optimal boundary of the firm, discuss Pfizer's make-or-buy decision for developing and producing its COVID vaccine. What stages-of the vertical chain should Pfizer consider conducting inhouse, and which should be outsourced? Provide reasons for your findings.

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Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.