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COVID-19 Boosters: New MMWR Report Explores Waning Immunity   

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1. Ferdinands JM, Rao S, Dixon BE, et al. Waning 2-Dose and 3-Dose Effectiveness of mRNA Vaccines Against COVID-19–Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance — VISION Network, 10 States, August 2021–January 2022. MMWR Feb. 18, 2022.
2. Pajon R, Doria-Rose N, Shen X, et al. SARS-CoV-2 Omicron Variant Neutralization after mRNA-1273 Booster Vaccination. NEJM.  Jan. 26, 2022.
3. Odenheimer A, Bloomberg. Israel panel recommends fourth vaccine dose for adults 18 and over. Fortune. Jan. 25, 2022.
4. Rabinovitch A.  Israeli study shows 4th shot of COVID-19 vaccine less effective on Omicron. Reuters.  Jan. 17, 2022.
5. SARS-CoV-2 variants of concern and variants under investigation in England. Technical briefing 33. 23 December 2021
6. UK Health Security Agency. Ferguson N, Ghani A, Cori A, et al. Report 49 - Growth, population distribution and immune escape of Omicron in England. Imperial College of London. Updated Dec. 20, 2021.
7. Hammerman A, Sergienko R, Friger M, et al. Effectiveness of the BNT162b2 Vaccine after Recovery from Covid-19. NEJM. Feb. 16, 2022. NEJM. Feb. 16, 2022.
8. Hall V, Foulkes S, Insalata F, et al. Protection against SARS-CoV-2 after Covid-19 Vaccination and Previous Infection. NEJM. Feb. 16, 2022.   
9.  Mellor S. GSK says its COVID antibody therapy works against Omicron. Here’s what other drugmakers say about their treatments. Fortune. Dec. 7, 2022.
10. Christensen J. CNN Health. Feb. 11, 2022.
11. Goodman B. As BA.2 subvariant of Omicron rises, lab studies point to signs of severity. CNN Health. Feb. 17, 2022.
12. FDA authorizes new Covid-19 monoclonal antibody that works against Omicron variant.
13. Lilly's bebtelovimab receives Emergency Use Authorization for the treatment of mild-to-moderate COVID-19. Feb. 11, 2022.

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