CLEAN : Ebola vaccine trials begin in Liberia

The video discusses a study on vaccines, focusing on their effectiveness and safety. It outlines the study's objectives, such as determining the duration of protection against Ebola and the safety of the vaccines. The mechanism of vaccines is explained, highlighting how they expose the immune system to build immunity. The study involves several phases, with a significant number of participants to ensure comprehensive results. The ultimate goal is to ensure that future exposures to the virus result in milder symptoms, reducing the risk of severe outcomes.

What is one of the main goals of the ongoing vaccine study?

• To determine the cost of vaccine production

• To develop a new type of vaccine

• To test vaccines on animals

• To find out if the vaccines can protect against Ebola

How does the immune system respond to a virus after initial exposure?

• It causes severe symptoms immediately

• It becomes weaker against the virus

• It builds immunity to recognize and fight the virus

• It ignores the virus completely

What is a potential outcome for someone exposed to a virus after vaccination?

• They will experience severe symptoms

• They will have no symptoms at all

• They may have mild symptoms like a slight fever

• They will be guaranteed to get sick

How many participants are involved in the initial phase of the study?

• 100 participants

• 60 participants

• 600 participants

• 6,000 participants

What is the focus of the final phase of the study?

• Studying the safety of vaccines

• Developing new vaccines

• Testing on a large group of 27,000 people

• Reducing the cost of vaccine production