Measles
seems to be on the loose again. Here is a briefing!
Unsure about measles and vaccines? Here’s the expert guide
Australia is experiencing an increase in the number of cases
of measles, but the US has had more serious outbreaks. Our GP columnist takes
you through the latest on the disease and how to prevent its spread.
DR MAGDALENA SIMONIS
6:00 AM July 19, 2025.
Measles cases in Australia continue to climb, and the
latest reports from Western Australia bring the number to about 80, across
all states and territories.
The detection of measles in flight staff and a few miners in
a remote mining town in WA, coupled with the recent announcement of suboptimal
childhood and adolescent immunisation rates, raises concerns around the
potential for a return of the measles epidemic we witnessed prior to the 1970s
vaccination program.
Most people these days don’t realise how contagious or
serious measles is; in fact, it is one of the most contagious diseases in the
world. An unvaccinated person who is exposed is 90 per cent likely to contract
the disease from droplets spread through the air or contaminated surfaces – and
the incubation period, which is when a person is asymptomatic but contagious,
can be anywhere from seven to 18 days.
A person with measles will infect 12 to 18 others on
average, as compared to a person with Covid-19, who can infect about three
people on average.
Measles was almost eradicated in Australia and was no longer
an endemic disease by March of 2014, although there were occasional cases
brought back by travellers returning from countries with low vaccination rates,
much like we are seeing now.
So, given it never really disappeared in the first place,
why is such a ruckus being made about it?
MEASLES: WHAT YOU NEED TO KNOW
- Measles vaccinations
are safe and provide lifelong protection in 99 of every 100 people
vaccinated
- Measles
vaccination is free for those born on or after 1966.
- Since
Covid-19, Australian childhood and adolescent vaccination rates have
fallen short of the 95 per cent WHO recommendation, and it’s a trend we
are seeing across the globe.
- See
your doctor within 72 hours of contact with a known case for immediate
vaccination, if unvaccinated.
- If
you have contracted measles, make sure you isolate from others for four
days after the rash appears and notify your contacts also. If exposed but
not ill, you should isolate for up to 14 days.,
- Measles
is a severe viral illness, and you are 90 per cent likely to contract it
if exposed and non-immune.
- Measles
can cause life-threatening pneumonia (one in 15) and encephalitis (one in
1000) which can lead to hospitalisation, lasting health impacts and even
death.
- Vaccination
for measles comes as a triad with mumps and rubella. Missing this means
you miss all three.
- See
your doctor prior to travel to discuss your measles vaccination status.
There is valid cause for concern from what we are seeing
unfold in the US as the number of measles cases reported on July 15 has
surpassed 1309, with three confirmed deaths, reaching a 33-year high. This rise
in infections is partly due to vaccine hesitancy, which is strongly driven by
widespread vaccine misinformation, although this might not be the only
explanation for the cases we are seeing in Australia.
The 20 to 49-year-old age group is heavily represented among
the recent measles cases in Australia, due to incomplete vaccination and
overseas travel, usually to southeast Asia where national uptake of
vaccinations is lower.
Catching
up with family and friends or just returning to work or university after a
holiday escape can expose those who are at greatest risk, which is children
under 24 months along with other under-vaccinated adolescents, young adults and
pregnant women.
Those born before 1966 from countries with similar national
vaccination programs to Australia are assumed to be immune to measles due to
the national immunisation programs that were in place throughout schools at
that time and the measles epidemics that swept across the globe.
If you come from another country and are not sure about your
vaccination status, it is safe to get another vaccination – although a blood
test can confirm your immune status. Those who contracted measles are
considered immune for life, as are those who have received two vaccinations,
which provide 99 per cent lifelong immunity.
Declining vaccination rates are a concern for population
health
Since Covid-19, Australian childhood and adolescent
vaccination rates have fallen short of the 95 per cent World Health
Organisation recommendation and it’s a trend we are seeing across the globe.
The latest Australian childhood immunisation rates are 92.14 per cent for
one-year-olds, 90.44 per cent for two-year-olds and 93.63 per cent for
five-year-olds.
These are the lowest rates we have seen since 2016, which is
concerning because herd immunity requires 95 per cent vaccination rates against
preventable communicable diseases such as polio, tetanus, measles, rubella,
diphtheria, haemophilus influenza, and pertussis.
Herd immunity protects the most vulnerable who can’t have
vaccines for a variety of reasons, those where vaccination has been ineffective
and people, especially children under two years, who are not yet fully
vaccinated.
One can reasonably say that the highest risk at present is
from overseas travel. However, despite our overall effective immunisation
campaigns, we do risk facing another measles epidemic if national efforts fail
to improve our vaccination uptake rates.
What is measles and how does it present?
There are two types of measles: the measles which we are
witnessing a resurgence of is caused by the virus “rubeola”, and the other is
called “rubella” (formerly “German measles”). They are two distinct viruses
with different presentations and complications. Measles is usually a more
severe viral illness with potential complications such as pneumonia,
encephalitis and even death. Rubella is a milder viral illness but causes
severe birth defects in unvaccinated pregnant women.
The first symptoms of measles (rubeola) are fever, sore
throat, runny nose, red stinging eyes and dry cough. At first this can appear
like a severe viral illness of any kind, until the characteristic rash appears.
The flat, spotty rash over the torso and face is a typical feature of measles
and usually appears four days into the infection. The spots then coalesce to
form a generalised redness on the face and body and there can be small white
spots on the inside of the mouth and throat called Kolpiks spots.
Secondary complications are more likely to affect
unvaccinated adults and young children, rather than adolescents and young
adults. These are usually severe and include middle ear infection, pneumonia
(one in 15), and even a serious form of brain inflammation called encephalitis
(one in 1000).
An early warning sign of measles-related encephalitis is
severe headache and irritability which can progress, causing behavioural
changes, confusion and convulsions. Lasting intellectual disability occurs in
40 per cent of those with encephalitis, and 10 per cent will die from the
inflammation. It’s a devastating disease and can sometimes lead to subacute
sclerosing panencephalitis, or SSPE, which is a rare immune-mediated
deterioration of the brain that develops six to 15 years later. So for those
who fear the measles vaccine, it’s important to understand that the risk of
vaccine-related encephalitis is 1000 times lower, at a rate of 1 in a million,
than catching the disease and leaving it to chance. Having the vaccine is much
safer than having the disease.
What to do if exposed to measles
If you have been exposed and are not sure what to do, see
your general practitioner within 72 hours for post-exposure prophylaxis.
Diagnosis is made by clinical presentation and laboratory testing which
includes taking swabs of the throat and nasal passages for PCR (polymerase
chain reaction) and blood for serology testing and the presence of antibodies.
The serology test measures immunoglobulin levels which can
detect recent infection (IgM) or long lasting immunity (IgG), due to previous
infection or immunity. PCR tests are most sensitive within the first few days
after the rash appears. Serology testing for IgM antibodies may need to be
repeated if negative in the early stages of the illness.
It is a reportable disease, so we can track its progress
through the community and it is important that you notify your contacts
immediately and get them to see their doctor.
As with other viral illnesses, symptomatic relief is
recommended along with rest, fluids, simple analgesia and isolation for up to
four days after the rash appears. Those who have been in contact with a case
might need to isolate for up to 14 days after the last contact with the
infectious person.
It’s important to know your vaccination status but if
uncertain or unvaccinated, the measles mumps rubella vaccine (MMR) should be
administered within 72 hours of exposure, as this can reduce the severity of
infection or even prevent it. The MMR vaccine is government-funded for people
born on or after 1966. Make sure you isolate from others to prevent spread and
notify your contacts also.
Immunoglobulin can be administered within six days to those
unable to have the vaccine, or who are beyond the 72-hour window, or if they
are immunocompromised, are a pregnant woman, or an infant.
Measles Mumps Rubella vaccine MMR – it’s a triad
It’s important to know that the measles vaccine is delivered
as a triad along with mumps and rubella combined. This means that if a child or
adolescent misses their measles vaccine, they’re not getting the mumps and
rubella vaccines either.
One of the greatest successes of the national immunisation
programs in all nations has been the prevention of congenital rubella syndrome,
which is a cluster of birth defects that occur when pregnant women contract the
virus. The rubella virus can cross the placenta, infecting the unborn child and
causing disastrous complications such as nerve deafness, heart deformities,
mental retardation, spasticity, paralysis, cataracts and blindness, as well as
miscarriage and late-pregnancy fetal loss, to name a few. The impact of rubella
is worse the earlier in the pregnancy the woman is exposed, and the best way to
prevent this is to be fully vaccinated prior to pregnancy. The measles mumps
rubella vaccine cannot be given when pregnant.
Vaccination recommendations (Australian Immunisation
Handbook)
Know your vaccination status
It is important that you ascertain your immunisation status.
This can be accessed from the Australian Immunisation Register inquiries line
(1800 653 809), or you can access this from your electronic health record.
The catch-up vaccination program for children up to the age
of 10 years can be accessed here:
https://immunisationhandbook.health.gov.au/contents/catch-up-vaccination#using-the-catchup-worksheet-for-children-aged-10-years
Children who have not received a measles-containing vaccine
at the recommended schedule points may need an alternative schedule
Catch-up vaccination for measles
Measles-containing vaccine is recommended for:
- Children
≥12 months of age
- Adolescents
and adults born during or since 1966 who have not received two doses of
measles-containing vaccine, particularly
– healthcare workers
– childhood educators and carers
– people who work in long-term care facilities
– people who work in correctional facilities
– travellers
Children:
Measles-containing vaccine is recommended for children
- at
12 months of age as MMR (measles-mumps-rubella) vaccine, and
- at
18 months of age as MMRV (measles-mumps-rubella-varicella) vaccine.
Measles-containing vaccines are not routinely recommended
for infants younger than 12 months of age. This is because maternal antibodies
to measles persist in many infants after birth, declining progressively over
the first year of life. These may interfere with active immunisation before 12
months of age.
Adolescents and adults:
All adolescents and adults born during or since 1966 should
have either:
- documented
evidence of two doses of measles-containing vaccine given at least four
weeks apart and with both doses given ≥12 months of age, or
- serological
evidence of immunity to measles, mumps and rubella
People born before 1966 do not usually need to receive
measles-containing vaccine (unless serological evidence indicates that they are
not immune). This is because circulating measles virus and disease were very
prevalent before 1966, so most people would have acquired immunity from natural
infection.
Travel
For travel purposes now, it is important to ensure that you
are fully vaccinated against measles and have the MMR vaccine at least two
weeks prior to departure. The vaccines provide full protection and should be
administered 28 days apart.
Travellers born during or since 1966 are recommended to have
received two doses of measles-containing vaccine.
Associate Professor Magdalena Simonis AM is a leading
women’s health expert and adviser, a senior honorary research fellow at the
University of Melbourne department of general practice, and a longstanding
member of the Royal Australian College of General Practitioners’ expert
committee on quality care.
This column is published for information purposes only.
It is not intended to be used as medical advice and should not be relied on as
a substitute for independent professional advice about your personal health or
a medical condition from your doctor or other qualified health professional.
References:
- Doherty
M, Buchy P, Standaert B, Giaquinto C, Prado- Cohrs D, Vaccine impact:
Benefits for human health, Vaccine, Volume 34, Issue 52, 2016, Pages
6707-6714, ISSN 0264-410X
- Ongoing
decline in childhood immunisation rates sparks concerns
- Childhood
Immunisation Coverage
- Immunisation
Handbook: Measles
- Immunisation
Handbook: Catch-up Vaccination
Here is the link:
https://www.theaustralian.com.au/health/medical/unsure-about-measles-and-vaccines-heres-the-expert-guide/news-story/d6aef3d7e1e502ed7e8267db636eca27
Seems old age has one benefit! I seem to have very probably already
had the disease (I do have a vague memory of an itchy rash as a 7-8 year old)
so it probably won’t come back!
It is worth finding out if you need vaccination as it can be a pretty nasty, as you read above!
David.