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Krause, P. R., Fleming, T. R., Peto, R., Longini, I. M., Figueroa, J. P., Sterne, J. A. C., Cravioto, A., Rees, H., Higgins, J. P. T., Boutron, I., Pan, H., Gruber, M. F., Arora, N., Kazi, F., Gaspar, R., Swaminathan, S., Ryan, M. J., & Henao-Restrepo, A.-M. (2021). Considerations in boosting COVID-19 vaccine immune responses. The Lancet, 4. https://doi.org/10.1016/S0140-6736(21)02046-8

Sandra Ciesek. (2021, December 8). Unsere ersten Daten zur Neutralisation von Omicron versus Delta sind fertig: 2x Biontech, 2x Moderna, 1xAZ/1x Biontech nach 6 Monaten 0% Neutralisation bei Omicron, auch 3x Biontech 3 Monate nach Booster nur 25% NT versus 95% bei Delta. Bis zu 37fache Reduktion Delta vs. Omicron https://t.co/w0gHww26sg [Tweet]. @CiesekSandra. https://twitter.com/CiesekSandra/status/1468465347519041539

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Hamblin, J. (2021, December 9). Perspective | Omicron won’t keep us from ending the pandemic. We’re doing that ourselves. Washington Post. https://www.washingtonpost.com/outlook/2021/12/09/omicron-coronavirus-individual-threat/

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Le Page, M. (2021, November 22). What we know so far about AY.4.2 and other new coronavirus variants. New Scientist. https://institutions.newscientist.com/article/2298363-what-we-know-so-far-about-ay-4-2-and-other-new-coronavirus-variants/?utm_campaign=echobox&utm_medium=social&utm_source=Twitter

ReconfigBehSci. (2021, December 23). Risk of hospital stay 40% lower with Omicron than Delta, UK data suggests https://t.co/VupN8hY4qq [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1473916654421643266

ReconfigBehSci. (2021, December 11). RT @DrEricDing: DOUBLING % in one day: The spike of probable #Omicron variant in Scotland🏴󠁧󠁢󠁳󠁣󠁴󠁿 has critically surged—Now at 13.3%, up fro… [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1469596523222781954

John Burn-Murdoch. (2021, November 25). Five quick tweets on the new variant B.1.1.529 Caveat first: Data here is very preliminary, so everything could change. Nonetheless, better safe than sorry. 1) Based on the data we have, this variant is out-competing others far faster than Beta and even Delta did 🚩🚩 https://t.co/R2Ac4e4N6s [Tweet]. @jburnmurdoch. https://twitter.com/jburnmurdoch/status/1463956686075580421

ReconfigBehSci. (2021, December 11). RT @thehowie: BREAKING: Hospitalizations South Africa Hospitalizations⬆️67% week over week. Gauteng Province⬆️66%. GP⬆️1.6% from yesterd… [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1469685234149072897

Trevor Bedford. (2021, December 11). We find that logistic growth of Omicron sequence fraction looks similar between the UK, the US and Germany with roughly 1% of sequenced cases in all three countries being Omicron on Dec 1. 3/10 https://t.co/De0t2xreU9 [Tweet]. @trvrb. https://twitter.com/trvrb/status/1469784757261127685

ReconfigBehSci. (2021, December 17). RT @EricTopol: No evidence that Omicron is less severe, new @imperialcollege study reports https://ft.com/content/020534b3-5a54-4517-9fd1-167a5db50786 https://t.co/5YYzJ6tVtc [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1472156681098469380

Nature Portfolio. (2021, October 15). A study in @NatureMedicine indicates that the effectiveness of the Pfizer/BioNTech and Oxford-AstraZeneca vaccines against SARS-CoV-2 infections with symptoms or high viral burden is reduced with the Delta variant compared to the Alpha variant. Https://go.nature.com/3vecpoj https://t.co/XQdnMYguFz [Tweet]. @NaturePortfolio. https://twitter.com/NaturePortfolio/status/1449145321188216836

Prof. Shane Crotty. (2021, October 19). 1/ The regular vaccines give great booster responses against Delta and other variants This was first shown by Moderna, with “original recipe” vaccine booster, compare to Beta booster. Https://nature.com/articles/s41591-021-01527-y https://t.co/g7YDwGIURP [Tweet]. @profshanecrotty. https://twitter.com/profshanecrotty/status/1450489709050744833

ReconfigBehSci. (2021, December 20). RT @thehowie: South Africa Deaths (7 day average) are near double levels of a few weeks ago. They will go up further. They are only 7.5%… [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1472991477672419334

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Shalin Naik [@shalinhnaik]. (2021, October 14). 📢The first episode of the @thejabgab http://thejabgab.com is LIVE!! 🎙 Join me and the fabulous comedians @nazeem_hussain and @calbo as they chat about the Delta variant, vaccines …. And cows? With experts @DrKGregorevic and @BedouiSammy! Search your fav platform or... Https://t.co/bo4HiRfqF6 [Tweet]. Twitter. https://twitter.com/shalinhnaik/status/1448510610837159939

Shalin Naik. (2021, October 14). 📢The first episode of the @thejabgab http://thejabgab.com is LIVE!! 🎙 Join me and the fabulous comedians @nazeem_hussain and @calbo as they chat about the Delta variant, vaccines …. And cows? With experts @DrKGregorevic and @BedouiSammy! Search your fav platform or... Https://t.co/bo4HiRfqF6 [Tweet]. @shalinhnaik. https://twitter.com/shalinhnaik/status/1448510610837159939

ReconfigBehSci [@SciBeh]. (2021, November 1). RT @HJWesteneng: Growth advantage and extrapolation of AY.4.2 based on Sanger Institute data in the UK (multilevel multinomial model). Base… [Tweet]. Twitter. https://twitter.com/SciBeh/status/1455467011509731332

Dr Dominic Pimenta [@DrDomPimenta]. (2021, December 15). An illustration of communicating risk with “less severe” variants: [Thread] Assume Omicron is 4x more transmissible than Delta. [1] Assume Omicron leads to 1/3 less admissions than Delta. [Figure below] Assume 1 in 100 cases of Delta are admitted to hospital. Https://t.co/XtnVwoOrUo [Tweet]. Twitter. https://twitter.com/DrDomPimenta/status/1471094002808242177

ReconfigBehSci [@SciBeh]. ‘RT @vikkypaedia: B.1.1.529 Seems to Have Gone from 0.1% to 50% in Just a Couple of Weeks, When It Took Delta Several Months to Achieve That…’. Tweet. Twitter, 26 November 2021. https://twitter.com/SciBeh/status/1464194450406752282.

Pérez-Then, E., Lucas, C., Monteiro, V. S., Miric, M., Brache, V., Cochon, L., Vogels, C. B. F., Cruz, E. D. la, Jorge, A., Santos, M. D. los, Leon, P., Breban, M. I., Billig, K., Yildirim, I., Pearson, C., Downing, R., Gagnon, E., Muyombwe, A., Razeq, J., … Iwasaki, A. (2021). Immunogenicity of heterologous BNT162b2 booster in fully vaccinated individuals with CoronaVac against SARS-CoV-2 variants Delta and Omicron: The Dominican Republic Experience (p. 2021.12.27.21268459). medRxiv. https://doi.org/10.1101/2021.12.27.21268459

Nathan Grubaugh [@NathanGrubaugh]. (2021, September 24). Hi @Newsweek 👋. I understand that #variant news has been slow recently with the near-complete dominance of Delta, but do you really need to go and make things up? Lineage R.1 is not a concern. Let me briefly explain why. (1/4) https://t.co/OD46PsXZEu [Tweet]. Twitter. https://twitter.com/NathanGrubaugh/status/1441522760832933888

Levine-Tiefenbrun, M., Yelin, I., Alapi, H., Katz, R., Herzel, E., Kuint, J., Chodick, G., Gazit, S., Patalon, T., & Kishony, R. (2021). Viral loads of Delta-variant SARS-CoV-2 breakthrough infections after vaccination and booster with BNT162b2. Nature Medicine, 1–3. https://doi.org/10.1038/s41591-021-01575-4

Morris, J. (2021, August 17). Israeli data: How can efficacy vs. severe disease be strong when 60% of hospitalized are vaccinated? Covid Data Science. https://www.covid-datascience.com/post/israeli-data-how-can-efficacy-vs-severe-disease-be-strong-when-60-of-hospitalized-are-vaccinated

Scott, national medical reporter S., & Thorne, the S. R. T. L. (2021, July 5). The Delta COVID variant is spreading overseas. Here’s why experts say it’s “absolutely essential” to protect children. ABC News. https://www.abc.net.au/news/2021-07-06/children-need-covid-protection-vaccines-experts-say/100269228

Sanderson, K. (2021). COVID vaccines protect against Delta, but their effectiveness wanes. Nature. https://doi.org/10.1038/d41586-021-02261-8

Carl T. Bergstrom. (2021, August 18). 1. There has been lots of talk about recent data from Israel that seem to suggest a decline in vaccine efficacy against severe disease due to Delta, waning protection, or both. This may have even been a motivation for Biden’s announcement that the US would be adopting boosters. [Tweet]. @CT_Bergstrom. https://twitter.com/CT_Bergstrom/status/1427767356600688646

Tao, K., Tzou, P. L., Nouhin, J., Gupta, R. K., de Oliveira, T., Kosakovsky Pond, S. L., Fera, D., & Shafer, R. W. (2021). The biological and clinical significance of emerging SARS-CoV-2 variants. Nature Reviews Genetics, 1–17. https://doi.org/10.1038/s41576-021-00408-x

Eric Topol. (2021, June 9). Despite increasing incentives, the US vaccination campaign is really struggling. Notably, the top 5 states are approaching 60% total population fully vaccinated which should provide strong protection vs the delta variant. A different story for the bottom 5 states @OurWorldInData https://t.co/boqk3Khhuc [Tweet]. @EricTopol. https://twitter.com/EricTopol/status/1402413221667954690

Prof. Shane Crotty. (2021, October 15). And here https://t.co/aDPrQ17AUD [Tweet]. @profshanecrotty. https://twitter.com/profshanecrotty/status/1449030846711681025

Marc Lipsitch. (2021, July 20). At the risk of boiling down too much and certainly losing some detail, one way to summarize this wonderful thread is that when we think about vaccine effectiveness, we should think of 4 key variables: 1 which vaccine, 2 age of the person, 3 how long after vax, 4 vs what outcome. [Tweet]. @mlipsitch. https://twitter.com/mlipsitch/status/1417595538632060931

Callaway, E. (2021). Heavily mutated Omicron variant puts scientists on alert. Nature, 600(7887), 21–21. https://doi.org/10.1038/d41586-021-03552-w

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ReconfigBehSci. (2022, January 1). RT @wanderer_jasnah: Quick glance at B.1.640.2 before anyone asks me about it: It’s basically B.1.1.7 w/a large Spike NTD deletion. I see… [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1478289563776962563

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Cornelius Roemer. (2022, February 12). Fantastic work by @UKHSA comparing serial intervals of BA.1, BA.2 and Delta as published in the most recent technical briefing. BA.2 seems to have even shorter serial interval than BA.1 This could help explain different relative growth rates of BA.2 vs BA.1 in different countries https://t.co/Gch94Ew8CX [Tweet]. @CorneliusRoemer. https://twitter.com/CorneliusRoemer/status/1492434232664375304

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

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PaedsHaemDoc. (2022, January 9). Had the misfortune (via @fatemperor) to come across Dr Paul Alexander -apparently credentialed yet in single blog post demonstrates perfectly either a disconnect from rational thought or deliberate misinformation spreading of the #masspsychosis of the anti-Vax crew let’s examine https://t.co/Ctd49cb1qK [Tweet]. @dr_barrett. https://twitter.com/dr_barrett/status/1479986071832248322

Jorge A. Caballero, MD (jorgecaballero.eth). (2022, January 10). 🧵/ I just spoke with two journalists about data that shows how the U.S. healthcare system is collapsing before our eyes. The million dollar question during both interviews was, “What else could we be doing right now?” The answer: Flatten the hospitalization curve. Now. [Tweet]. @DataDrivenMD. https://twitter.com/DataDrivenMD/status/1480607009867132928

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Tom Peacock. (2022, January 19). As its been getting increasing attention recently, I’m going to write a short thread on what we currently know about BA.2. -What is BA.2? -What is BA.2 doing currently? -Should we be concerned about it? [Tweet]. @PeacockFlu. https://twitter.com/PeacockFlu/status/1483768659420094464

How Long Are You Actually Immune for After Recovering From COVID-19? (2022, January 19). Lifehacker Australia. https://www.lifehacker.com.au/2022/01/covid-19-immunity-explained/

HKUMed finds Omicron SARS-CoV-2 can infect faster and better than Delta in human bronchus but with less severe infection in lung. (n.d.). Retrieved January 16, 2022, from https://www.med.hku.hk/en/news/press/20211215-omicron-sars-cov-2-infection?utm_medium=social&utm_source=twitter&utm_campaign=press_release

Natalie E. Dean, PhD. (2022, January 2). Interesting. From this afternoon in @nytimes: Https://nytimes.com/2022/01/01/us/omicron-covid-holidays-surge-testing.html https://t.co/qCCkjXKS2K [Tweet]. @nataliexdean. https://twitter.com/nataliexdean/status/1477487783992254464

Devlin, H., Davis, N., & correspondents, N. D. S. (2022, January 14). Expect another Omicron wave in early summer, Sage says. The Guardian. https://www.theguardian.com/world/2022/jan/14/expect-another-covid-omicron-wave-in-early-summer-sage-says

Helen Branswell. (2022, January 11). 1. #Omicron’s takeover was stunningly rapid and is now nearly complete, at least in the U.S. The latest “Nowcast” from @CDCgov (which uses recent data to model what’s happen now) suggests most of what is circulating here now is omicron. Https://t.co/6w3e8Ut5NW [Tweet]. @HelenBranswell. https://twitter.com/HelenBranswell/status/1480970453313277954

Tseng, H. F., Ackerson, B. K., Luo, Y., Sy, L. S., Talarico, C., Tian, Y., Bruxvoort, K., Tupert, J. E., Florea, A., Ku, J. H., Lee, G. S., Choi, S. K., Takhar, H. S., Aragones, M., & Qian, L. (2022). Effectiveness of mRNA-1273 against SARS-CoV-2 omicron and delta variants (p. 2022.01.07.22268919). https://doi.org/10.1101/2022.01.07.22268919

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Acme Birch Beer. (2021, December 13). A long thread on @NYTimes/@washingtonpost/@TheAtlantic’s favorite prediction-making expert, Monica Gandhi. Feb 22, 2021: “I need to say variants, shmariants, okay? I’m sorry, I don’t know what kind of trouble that’s going to get me in...” https://t.co/CwQL6QBG78 [Tweet]. @KindAndUnblind. https://twitter.com/KindAndUnblind/status/1470389931679883268