1. Harvard epidemiologist shares early impression of variant as first U.S. case is identified in California
https://news.harvard.edu/gazette/story/2021/12/harvard-epidemiologist-gives-early-impression-of-omicron/
2. Vaccine reduces transmission in breakthrough cases
https://news.harvard.edu/gazette/story/2021/12/vaccinated-who-get-breakthrough-infections-less-contagious/
3. Moderna edges out Pfizer vaccine in head-to-head comparison
https://news.harvard.edu/gazette/story/2021/12/moderna-vaccine-slightly-more-effective-than-pfizer/
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