Ever since Edward Jenner developed the first vaccine for smallpox, scientists have been working on ways to boost immunity to other diseases. Although Jenner’s breakthrough came in 1796, it took almost two centuries before smallpox was eradicated. It remains the only human disease to have been fully wiped out by vaccination but the prevalence of many other illnesses has been dramatically reduced following immunisation programmes.
January 25, 2021 @ 10:46 AM
COVID-19 (coronavirus disease) is an infectious illness caused by the SARS-CoV-2 virus. It was identified in late 2019. The disease spread rapidly around the world and was declared a global pandemic by the World Health Organisation in March 2020.Most people infected with the virus that causes COVID-19 experience mild to moderate respiratory symptoms. The most… Read more