The signs and symptoms of a<unk>  depend on the individual pathogen. In the mother, it may cause subtle signs such as an influenza-like illness, or possibly no symptoms at all. In such cases, the effects may be seen first at birth. Symptoms of a<unk>  may include fever and flu-like symptoms. The newborn is often small for gestational age. A petechial rash on the skin may be present, with small reddish or purplish spots due to bleeding from capillaries under the skin. An enlarged liver and spleen (hepatosplenomegaly) is common, as is jaundice. However, jaundice is less common in hepatitis B because a newborn's immune system is not developed well enough to mount a response against liver cells, as would normally be the cause of jaundice in an older child or adult. Hearing impairment, eye problems, mental retardation, autism, and death can be caused by<unk> s. The genetic conditions of Aicardi-Goutieres syndrome are possibly present in a similar manner.
Vertically transmitted infection
Intentional contagion of infection
Blood-borne disease
Opportunistic infection
Environmental disease
Laboratory-acquired infection
Sexually transmitted infection
Clonally transmissible cancer