Testing Underway on Combining Covid Vaccines: Johns Hopkins

The transcript discusses the potential combination of Pfizer and AstraZeneca vaccines to enhance global rollout. It covers preliminary data from trials, particularly in the US, and the UK's strategy of delaying the second AstraZeneca dose. The US approach, as guided by Dr. Fauci, emphasizes maintaining prescribed dosing sequences to combat variants. The transcript also highlights vaccine hesitancy and access issues, especially among healthcare workers in long-term care facilities.

What was the reason for some AstraZeneca trial participants in the US to receive the Pfizer vaccine?

• To prevent side effects from AstraZeneca

• Due to a shortage of AstraZeneca doses

• Because of lower efficacy signals at the time

• To test the combination of both vaccines

What is the efficacy rate of the AstraZeneca vaccine when the second dose is delayed by 10 to 12 weeks?

• 90%

• 95%

• 70%

• 82%

Why is the US hesitant to adopt the UK's vaccine dosing strategy?

• Due to concerns about vaccine supply

• To maintain international consistency

• Because of potential pressure on virus variants

• To avoid public confusion

What is a significant challenge in the US vaccine rollout according to the transcript?

• Limited storage facilities

• High cost of vaccines

• Hesitancy among long-term care workers

• Lack of vaccine doses

Who are currently prioritized for vaccination in most US states?

• All adults regardless of age

• Individuals under 65 with no health issues

• Frontline workers and those 65 and older

• Only healthcare workers