Name a clinical trial in which blood is transfused from a recovered COVID-19 patient to a coronavirus patient who is in critical condition.

Correct answer: (a) Plasma therapy

Explanation

In plasma therapy (convalescent plasma therapy), plasma from a person who has recovered from COVID-19, which contains antibodies against the virus, is given to a seriously ill patient to help fight the infection.

Remdesivir is an antiviral drug, and Solidarity was a WHO trial of several treatments.