How contagious is measles?

Hello,

Welcome to icliniq.com.

I understand your concerns about the measles outbreak and your child's immunity.

Let me address each of your questions to provide clarity and guidance:

1. Effectiveness of Childhood Vaccination: Measles vaccination is highly effective when administered according to the recommended schedule. The measles vaccine typically provides immunity in around 93 to 97 % of individuals after two doses. However, no vaccine is 100 % effective for everyone.

2. Waning Immunity and Breakthrough Infections: Waning immunity refers to the gradual decrease in protection provided by a vaccine over time. While most individuals maintain immunity for their entire lives after receiving two doses of the measles vaccine, some people may experience a decrease in antibody levels over the years. This can potentially lead to breakthrough infections, where vaccinated individuals contract the disease, although usually in a milder form compared to unvaccinated individuals.

3. Neutralizing Antibodies and Immunity: Neutralizing antibodies are a specific type of antibodies that are particularly effective at preventing the virus from entering cells and causing infection. They play a crucial role in providing immunity against measles. While other antibodies can help in fighting off the virus, neutralizing antibodies are considered especially important for preventing measles infection.

4. Need for Booster Shots: Currently, the CDC recommends two doses of the measles, mumps, and rubella (MMR) vaccine for most individuals: the first dose at 12 to 15 months of age and the second dose at four to six years of age. In countries like India, the first dose of MMR vaccine is usually administered at nine months of age. The second dose of MMR vaccine is given typically at 15 to 18 months of age. For those who may be at higher risk of exposure to measles (such as during outbreaks) or those traveling internationally, a booster dose may be recommended by healthcare providers. Booster shots can help reinforce immunity and protect against waning immunity or exposure during outbreaks.

5. Risk from Unvaccinated Individuals: Unvaccinated individuals are at higher risk of contracting and spreading measles. If your sister's children are not vaccinated and are in close contact with your daughter, there is a risk of transmission if they were to contract measles. Measles is highly contagious and spreads through respiratory droplets from coughing and sneezing. It can remain infectious in the air and on surfaces for several hours.

6. Measles Contagiousness and Eradication: Measles is indeed highly contagious. Before widespread vaccination efforts, measles caused millions of deaths globally each year. While significant progress has been made in reducing measles cases through vaccination programs, outbreaks can still occur in communities with low vaccination rates or when immunity wanes.

What You Can Do:

1. Check Vaccination Status: Ensure your daughter is up-to-date on her vaccinations. If there is a specific concern about waning immunity or if she may be exposed to measles, consult with your healthcare provider about the need for a booster dose.
2. Encourage Vaccination: Advocate for vaccination within your family and community. Vaccination not only protects individuals but also contributes to community immunity, reducing the spread of contagious diseases like measles.
3. Practice Good Hygiene: Encourage regular handwashing, covering coughs and sneezes, and avoiding close contact with individuals who are sick.
4. Stay Informed: Monitor updates from reliable health authorities regarding measles outbreaks and vaccination recommendations.

If you have specific concerns about your daughter's immunity or vaccination status, consulting with her family doctor can provide personalized guidance based on her medical history and current circumstances.

I hope this information will help you.

Thanks.