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Meaghan Kall. (2022, February 17). BA.2 risk assessment New this week is upgrading Immune Evasion—Amber 🟨 from low to moderate that BA.2 is antigentically different to BA.1 Unsurprising given the mutation profile, with BA.2 slightly more immune evasive than BA.1 on neuts studies https://t.co/n6DWtiRaNH [Tweet]. @kallmemeg. https://twitter.com/kallmemeg/status/1494100170195312646

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Eric Feigl-Ding. (2022, January 13). WATCH📺—Despite 97.5% of all adults in England🏴󠁧󠁢󠁥󠁮󠁧󠁿 with antibodies to #COVID19 (via vax/infection)–hospitalizations still surging. Why? Because variants like #Omicron are adapting. Need multivalent vax, plus ➡️N95 & ventilation are agnostic to variants—Key! Https://t.co/gDNRJIWojX [Tweet]. @DrEricDing. https://twitter.com/DrEricDing/status/1481732793482813443

Anthony J Leonardi, PhD, MS. (2022, January 22). Wow. This is concerning. H/t @ForesightWisdom it is learning to become more chronic. Https://t.co/XwFR4D0kiy [Tweet]. @fitterhappierAJ. https://twitter.com/fitterhappierAJ/status/1484996537889476610

Ulrich Elling. (2022, January 12). While #Omicron BA.1 leads the race, the little sister BA.2 is catching up in numbers. They are rather different with likely functional implications. BA.2 might be more immune evasive in RBD, less in NTD. And due to reduced mutation load in NTD maybe different fusion properties? Https://t.co/kEACjzQDs3 [Tweet]. @EllingUlrich. https://twitter.com/EllingUlrich/status/1481214901997682692

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Early data indicate vaccines still protect against Omicron’s sister variant, BA.2. (2022, January 28). STAT. https://www.statnews.com/2022/01/28/early-data-indicate-vaccines-still-protect-against-omicrons-sister-variant-ba-2/

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Omicron largely evades immunity from past infection or two vaccine doses | Imperial News | Imperial College London. (n.d.). Imperial News. Retrieved January 12, 2022, from https://www.imperial.ac.uk/news/232698/omicron-largely-evades-immunity-from-past/

Theo Sanderson. (2021, December 8). SGTF Regional data to Dec 6 from https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1039470/Omicron_SGTF_case_update.pdf (Last data point would be expected to be incomplete based on the dates and so to slightly understate growth. And also will already have moved substantially from the midpoint of that last week on 3rd Dec.) https://t.co/1L6tM0sXIZ [Tweet]. @theosanderson. https://twitter.com/theosanderson/status/1468648673668128775