Not long before the HIV virus appeared, in October of 1977 the last reported case of smallpox on Earth completed treatment, making it the first virus in human history to be completely eradicated.
在愛滋病毒現身前不久，1977 年 10 月間，最後一位自然感染的天花病例被通報並完成治療，成了人類有史以來首度完全撲滅的病毒。