The Delta Variant and Vaccine Protection

The video discusses the impact of COVID-19 variants on vaccine efficacy, focusing on the mutation of the virus and the effectiveness of vaccines like Pfizer, J&J, and AstraZeneca. It highlights the challenges in obtaining statistically significant data due to the rarity of severe cases and the importance of T cell responses. The video concludes with a call to continue vaccinations and monitor emerging variants.

What is the primary way COVID-19 viruses mutate?

• By modifying the cell membrane

• By changing the virus's DNA

• By altering the cell nucleus

• By changing the spike protein regions

Which variant is known for increased transmissibility and accounts for over 80% of US cases?

• Beta variant

• Alpha variant

• Gamma variant

• Delta variant

What is the reported efficacy of the Pfizer vaccine against the Delta variant according to UK studies?

• 93%

• 88%

• 75%

• 85%

What is a significant factor in COVID-19 immunity that is not measured in many studies?

• Spike protein response

• T cell response

• Viral load

• Antibody count

What was the efficacy of the Johnson & Johnson vaccine against hospitalization from the Delta variant in South Africa?

• 71%

• 90%

• 85%

• 67%

Which vaccine showed no significant benefit against mild to moderate infections with the beta variant?

• Johnson & Johnson

• Pfizer

• Moderna

• AstraZeneca

What is the current status of the Delta plus variant?

• It is under investigation

• It accounts for a large number of cases

• It has been eradicated

• It is more transmissible than Delta