Understanding Lab Tests for Measles Infection
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Measles is a highly contagious viral infection that primarily affects the respiratory system and causes a characteristic skin rash. While measles is often diagnosed based on clinical symptoms and physical examination, blood tests play a crucial role in confirming the infection and determining immune status.
Recommended Test
Measles Antibody (IgG)
This test measures IgG antibodies specific to the measles virus in the blood. High levels of these antibodies indicate either a recent or past infection with measles, as the immune system produces these antibodies in response to exposure to the measles virus. This test is valuable for confirming measles infection and assessing immunity status.
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Why Blood Testing is Important for Measles
Blood tests for measles help confirm the diagnosis, especially in cases where symptoms may be unclear or overlap with other viral infections. Testing is also essential for determining whether someone has immunity to measles from previous infection or vaccination, which is important for public health monitoring and outbreak control.
Understanding Your Results
Measles IgG antibodies typically develop after infection or vaccination and can persist for years, providing long-term immunity. Elevated levels may indicate recent infection, past infection, or successful vaccination. Your healthcare provider will interpret results in the context of your symptoms and medical history.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. If you suspect measles exposure, contact your healthcare provider immediately as this is a reportable infectious disease.
