Pfizer Says Its Antiviral Pill Is Highly Effective in Treating Covid November 05, 2021 +1 and it is the first purpose-built to attack the virus that causes the disease. IFTTT NYT NYT > Business NYTimes Pfizer’s is the second pill to show effectiveness against Covid-19 and it is the first purpose-built to attack the virus that causes the disease. IFTTT NYT NYT > Business NYTimes Pfizer’s is the second pill to show effectiveness against Covid-19