Measles: What You’ve Been Asking and What the Data Shows
- Octavian M. Belcea, MD
- Feb 21
- 4 min read
Updated: Feb 21
Over the past few weeks, many of you have asked me about measles. Some of you are vaccinated. Some of you are not. Many of you are simply unsure what to think.
When several of you bring up the same concern, I pay attention. So I reviewed the CDC surveillance data myself.
What the Data Shows
Confirmed measles cases in the United States have increased compared to recent years. Early 2026 case counts are already significantly higher than typical early-year baselines from prior outbreak years.
But context matters.
What Measles Is Not
Some of you have told me this feels similar to the early days of COVID, when case counts and isolation dominated the conversation.
Here are the facts:
COVID-19 in early 2020 had a very high mortality rate, particularly in older adults and those with medical conditions. In many regions, early case fatality rates were around 3%, and up to 30% in hospitalized patients. Hospitals were overwhelmed and there was no baseline immunity. It was a virus the world has never seen before.
Measles been around for at least 1,000 years.
The mortality rate from measles is around 0.1% with most people recovering without any long-term complications.
That does not make measles harmless, but this is not 2020.
What Measles Is
Measles is an infection caused by a highly contagious airborne virus formally called Measles morbillivirus.
Its basic reproduction number (R₀) is about 12. This means that in a group of people who are not immune, one person with measles can infect 12 others. That is why measles spreads so easily.
If you or a household member were to develop measles, the first symptom is typically a high fever, often 101–104°F, followed by several days of cough, runny nose, and red eyes.
Other classic symptoms include:
A spreading rash that typically starts at the hairline.
Koplik spots
Complications are rare but can include pneumonia and encephalitis. Risk is higher in infants, immunocompromised individuals, and those with vitamin A deficiency (more on that further down).
A Word About Media and Risk Perception
You are seeing the headlines. Media operates on attention. Attention is driven by emotion. Emotion is driven by perceived threat.
Moving from 8 cases to 80 cases is a 900% increase.
Moving from 60 to 800 cases sounds explosive.
But 800 cases in a country of 330 million people is 0.0002% of the population.
All three statements are mathematically correct.
My responsibility to you is to translate statistics into practical risk for you and your family.
Your Immunity to Measles
If you are vaccinated, protection is typically durable, but not guaranteed.
Some of you may already have natural immunity. Those born before 1957 are presumed immune due to likely childhood exposure before widespread vaccination. Others may have had measles with mild symptoms and developed lifelong immunity.
We have the ability to check a measles IgG titer and provide objective confirmation.
What About Vitamin A?
Vitamin A plays a critical role in immune function and in maintaining the integrity of respiratory and gastrointestinal mucosal surfaces.
The measles virus frequently causes vitamin A levels to drop. Vitamin A is stored in the liver, and the virus affects how it is transported and used in the body. At the same time the body’s demand for vitamin A increases during an illness. The result can be a deficiency that results in more severe damage to mucosal tissue, increasing the risk for complications.
The CDC and WHO recommend Vitamin A supplementation patients with measles.
Vitamin A does not prevent the measles virus from infecting you.
It only reduces the risk of severe complications after an infection occurs.
This means that you should not take high-doses of vitamin A preventively. Excess vitamin A can cause liver toxicity.
Practical Options Available to You in My Office
1. Check Your Immunity
We have the capability to measure measles IgG titers to determine whether you have immunity. Some adults are immune without realizing it.
2. Early Testing If You Develop Symptoms
If you develop symptoms consistent with measles, we can perform a nasal swab PCR test to confirm or rule it out.
3. Vitamin A Status
If you are symptomatic, I recommend checking vitamin A levels.
How Long Is Measles Contagious?
Measles is contagious from the development of the first symptom until 4 days after the rash begins.
This is important because people can spread the virus before they realize it's measles. The highest level of contagiousness typically occurs when symptoms resemble a severe cold or flu.
The Longevity Perspective for You
Your metabolic health supports your immune competence. Sleep, muscle mass, micronutrients, and hormonal balance all contribute to how your body responds to all infections.
Final Thought
Whether you are vaccinated or not, clarity is better than anxiety.
Measles is highly contagious.
It is not early COVID.
The media environment amplifies emotion.
Your personal risk depends on your immunity and your overall health.
If you have questions about your immunity, your child’s risk, or new symptoms, talk to me.
To Your Good Health,
The Longevity Doctor®
Thank you very much for the information. One question: if symptoms appear vitamin A aquired by food sufficient?