Viral indicators refer to biomarkers or molecular signals that can be used to detect the presence of viral infections in a host organism. These indicators can include proteins, nucleic acids, antibodies, or other substances that are produced by the host in response to viral infection. By detecting these indicators, researchers can diagnose viral infections, monitor disease progression, and assess the effectiveness of treatments. Viral indicators play a crucial role in medical research, public health surveillance, and clinical practice in the field of virology.