Smallpox was eradicated in 1977. This amazing, global public health achievement isn’t just a page in a history book or an ...

While respiratory syncytial virus (RSV) typically causes mild symptoms in adults, the virus can be life-threatening for infants. The seasonal virus is the most common cause of lower respiratory tract ...

The virus, spread by ticks, can cause a disease that leads to swelling of the brain and permanent health problems in half of severe cases.

Maynooth University’s Prof Andrew Coogan wants to understand how sleep affects human health ‘out in the wild’ of the real ...

North Brother Island in New York City served as a quarantine zone for patients infected with deadly diseases such as smallpox ...

North Brother Island in New York served as a quarantine zone for those infected with deadly diseases such as typhoid and ...

COVID-19 has largely dropped out of the headlines, but the virus that causes it is still circulating. We ask what we should know about a new variant of SARS-CoV-2, the state of the COVID-19 pandemic ...

Covid has largely dropped out of the headlines, but the virus that causes it is still circulating. We ask what we should know about a new variant of SARS-CoV-2, the state of the Covid pandemic in 2025 ...

Vaccination has protected humans from an ever-lengthening list of infectious diseases: polio, yellow fever, diphtheria, ...

A head cold, or common cold, is a viral infection of the nose and throat. It is usually a mild illness, and involves symptoms in the head, such as a stuffed, runny nose and watery eyes. According ...

If you’ve been exposed to the herpes virus, it can take anywhere from 2 to 10 days for symptoms to appear and for the virus to be detected on a test. Learn more.