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The World Health Organization emphasizes the importance of maintaining safety measures to control COVID-19, warning against large gatherings and urging personal responsibility like mask-wearing and social distancing. Meanwhile, AstraZeneca has initiated phase three trials of its COVID-19 vaccine in the US, involving 30,000 diverse participants. The trials aim to test the vaccine's efficacy, with previous phases showing promising immune responses.

What does the World Health Organization recommend to prevent the spread of coronavirus?

• Opening up without control

• Wearing masks and social distancing

• Permitting large gatherings

• Avoiding handwashing

What is the main focus of AstraZeneca's phase three vaccine trials?

• Conducting trials outside the US

• Testing on children

• Involving diverse racial and ethnic groups

• Recruiting only healthy individuals

How many doses will participants in the AstraZeneca trial receive?

• One dose

• Two doses

• Three doses

• Four doses

What was the outcome of the earlier phases of AstraZeneca's vaccine testing?

• Robust immune response

• Negative immune response

• Weak immune response

• No immune response

What is the purpose of the health headlines mentioned in the transcript?

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• To provide entertainment

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