Trials Of Emergency COVID-19 Vaccine Begin In Hard-Hit Brazil

Brazil faces a severe COVID-19 crisis with over 2.1 million cases and 81,000 deaths. Amid this, a vaccine trial by Sinovac is underway, involving 9,000 healthcare workers. Brazil plans to produce 120 million doses if successful. The trials are crucial due to Brazil's high infection rate, providing a significant testing ground. Similar trials are also happening in South Africa and Britain.

Describe the current COVID-19 situation in Brazil as mentioned in the text.

What is the role of Oxford University in the context of COVID-19 vaccine development?