Armed conflicts and attacks

• Russo-Ukrainian War
  • Turkey offers to mediate between Ukraine and Russia over the conflict between the two nations. (Reuters)

Health and environment

• COVID-19 pandemic
  • COVID-19 pandemic in Europe
    • COVID-19 pandemic in Portugal
      • Portugal reports its first cases of the SARS-CoV-2 Omicron variant in 13 people associated with Belenenses SAD football club. (AP)
    • COVID-19 pandemic in Spain
      • Spain reports its first case of the SARS-CoV-2 Omicron variant in a person who travelled from South Africa. (El Pais)
    • COVID-19 pandemic in Sweden
      • Sweden reports its first case of the SARS-CoV-2 Omicron variant in a person who travelled from South Africa. (Reuters)
  • COVID-19 pandemic in Asia
    • COVID-19 pandemic in Israel
      • Miss Universe France 2021, Clémence Botino, a contestant at the Miss Universe contest in Eilat, Israel, tests positive for COVID-19. (L'Independant)
    • COVID-19 pandemic in the Philippines, COVID-19 vaccination in the Philippines
      • The Philippines launches a campaign to vaccinate 9 million people in three days in order to achieve 70% vaccination target and to prevent the spread of the Omicron variant. (The Straits Times)
  • International aid related to the COVID-19 pandemic
    • COVID-19 pandemic in Angola, COVID-19 pandemic in Kenya, COVID-19 pandemic in Barbados
      • Argentina donates 780,000 doses of the Oxford–AstraZeneca COVID-19 vaccine to Angola, Kenya and Barbados, which have all detected cases of the Omicron variant. (LMDiario)
  • COVID-19 pandemic in the United States
    • COVID-19 pandemic in Michigan
      • Michigan reports 4,181 hospitalizations from COVID-19, a new single-day record. (The Detroit News)
  • History of COVID-19 vaccine development
    • BioNTech says that it is developing a vaccine to combat the Omicron variant. (Reuters)

International relations

• Foreign relations of Turkey
  • Turkish President Recep Tayyip Erdoğan reveals his intentions to rebuild his country's ties with Egypt and Israel. (TRT World)
• Holy See–Russia relations
  • Cardinal Miguel Ángel Ayuso Guixot, the president of the Pontifical Council for Interreligious Dialogue began a six-day journey to Russia on November 23. Guixot met with Orthodox, Muslim, civil leaders. The parties discussed religious liberty and other human rights of minorities. (Catholic World News)

Politics and elections

• 2021 Honduran general election
  • While votes are still being counted, both Xiomara Castro and Nasry Asfura declare that their respective tickets have won the presidential election. (Al Jazeera)
• Magdalena Andersson is re-elected as Prime Minister of Sweden by the Riksdag after she resigned last week. (Euronews)

Science and technology

• Jack Dorsey resigns as the CEO of Twitter and is succeeded by Chief technology officer Parag Agrawal. (CNBC)
• Researchers from the National Autonomous University of Mexico discover two new antibiotic molecules inside the venom of a scorpion from the Diplocentrus genus, which may hold the properties to stop several different kinds of harmful bacteria and tumour cells. (The Yucatan Times)