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  2. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    The golden ratio φ and its negative reciprocal −φ −1 are the two roots of the quadratic polynomial x 2 − x − 1. The golden ratio's negative −φ and reciprocal φ −1 are the two roots of the quadratic polynomial x 2 + x − 1. The golden ratio is also an algebraic number and even an algebraic integer.

  3. Vaccine passports during the COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/Vaccine_passports_during...

    British Columbia has created a Proof of vaccination system which utilises a QR code. The system initially relied on paper receipts of the BC vaccine receipt and gradually migrated to a digital system. The QR code can also be physically printed out. [112] New Brunswick requires a Proof of Vaccination system using original immunisation records. [113]

  4. Vaccination requirements for international travel - Wikipedia

    en.wikipedia.org/wiki/Vaccination_requirements...

    At border checks, these travellers are required to show proof of vaccination against specific diseases; the most widely used vaccination record is the International Certificate of Vaccination or Prophylaxis (ICVP or Carte Jaune/Yellow Card). Some countries require information about a passenger's vaccination status in a passenger locator form.

  5. International Certificate of Vaccination or Prophylaxis

    en.wikipedia.org/wiki/International_Certificate...

    It confirmed the validity and use of international certificates of vaccination (Article 115), and updated the old model with a new version (Appendices 2, 3, 4). [7] The certificates mentioned were used for proof of vaccination against diseases such as cholera, yellow fever and smallpox; the term inoculation was no longer used.

  6. SMART Health Card - Wikipedia

    en.wikipedia.org/wiki/SMART_Health_Card

    The SMART Health Card framework is an open source [1] immunity passport program designed to store and share medical information in paper or digital form. [2] It was initially launched as a vaccine passport during the COVID-19 pandemic, but is envisioned for use for other infectious diseases. [3]

  7. COVID-19 vaccine card - Wikipedia

    en.wikipedia.org/wiki/COVID-19_vaccine_card

    Vaccine certificate/passport systems were introduced in the provinces of British Columbia, Manitoba, and Quebec starting in September 2021. [6] [7] [8] Since October 2021, all vaccination certificates follow a single national design standard, and include a QR Code for validation in accordance with the international SMART Health Card framework.

  8. Immunity passport - Wikipedia

    en.wikipedia.org/wiki/Immunity_passport

    An Italian health pass (fede di sanità) for travel during times of plague, 1611An immunity passport, [1] immunity certificate, [2] health pass or release certificate [3] (among other names used by various local authorities) is a document, whether in paper or digital format, attesting that its bearer has a degree of immunity to a contagious disease. [4]

  9. Visa policy of Qatar - Wikipedia

    en.wikipedia.org/wiki/Visa_policy_of_Qatar

    1 - Must present a confirmed hotel reservation in one of the designated VOA hotels booked through Discover Qatar for the period of stay. [5] 2 - Must present either a credit card or a debit card with a balance of at least 1000 USD. [2] 3 - If entering Qatar for tourism, a credit card or at least QAR 5000 in cash must be presented.