O98: Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

O98.5: Other viral diseases complicating pregnancy, childbirth and the puerperium

Viruses are pathogens and they can cause a variety of symptoms.

Your illness is making the pregnancy, the birth or the weeks after the birth more difficult. You may also already have had this kind of disease before your pregnancy. Your illness may then also have got worse due to the pregnancy, the birth or the weeks after the birth.