as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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construct a timeline for the coronavirus outbreak.
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december 2019: initial cases reported in wuhan, china

january 2020: coronavirus has spread to multiple countries

february 2020: world health organization (who) declares a public health emergency

march 2020: covid-19 declared a global pandemic

april 2020: many countries begin to reopen 

may 2020: vaccine research & development begins

june 2020: who announces start of vaccine distribution to low-income countries 

july 2020: vaccinations begin in developed countries

august 2020: vaccine trials begin in the us

september 2020: new virus strains appear

october 2020: global cases pass 40 million

november 2020: vaccine rollout begins in us

december 2020: virus cases reach an all-time high
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