Hepatitis D is caused by a defective RNA virus (delta agent) that can replicate only in the presence of hepatitis B virus. Hepatitis B infection rarely occurs as coinfection during acute hepatitis B or as superinfection during chronic hepatitis, also type B.
![](https://www.myspecialdoctor.it/wp-content/uploads/2017/07/foto-articolo-1.jpg)
Screening in medicine: what they are and why to do them
In the medical field, it is really crucial to be able to identify a disease in time as, if detected at an early stage, the chances of treatment and thus