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The video discusses the retesting of COVID-19 patients in South Korea and China, where some recovered patients have tested positive again. Experts suggest this may be due to test sensitivity or virus reactivation. In Los Angeles, efforts are underway to protect the homeless population from COVID-19 through testing and health screenings. Additionally, the FDA has approved a new drug for treating metastatic breast cancer, expediting its development due to the pandemic. The video concludes with an invitation to follow more news stories.

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