Australia, officially known as the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. It is the largest country in Oceania and the world’s sixth-largest country by total area.
Guinea is a country in West Africa, bordered on the west by the Atlantic Ocean. Formerly known as French Guinea (French: Guinée française), the modern country is sometimes referred to as Guinea-Conakry to distinguish it from other countries with “Guinea” in the name.
It’s known for the Mount Nimba Strict Nature Reserve, in the southeast. The reserve protects a forested mountain range rich in native plants and animals, including chimpanzees and the viviparous toad. On the coast, the capital city, Conakry, is home to the modern Grand Mosque and the National Museum.
Papua New Guinea, in the southwestern Pacific, encompasses the eastern half of New Guinea and its offshore islands. A country of immense cultural and biological diversity, it’s known for its beaches and coral reefs. Inland are active volcanoes, granite Mt. Wilhelm, dense rainforest and hiking routes like the Kokoda Trail. There are also traditional tribal villages, many with their own languages.
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.