Measles Spreads: Experts Warn of High Infectivity

Lower North Island Outbreak Reaches Eight Cases

An escalating measles outbreak in Wairarapa and Manawatū serves as a stark reminder of the virus’s potent contagiousness, health officials report.

Highly Contagious Virus Strikes

The current cluster has reached eight confirmed cases, with health authorities attributing the spread to international travel. Paediatric infectious disease specialist, Dr Emma Best, from the Immunisation Advisory Centre, highlighted the virus’s aggressive nature.

“If you’re not immune to measles, and you are in the space of somebody who has measles or doesn’t know they’re getting measles, there’s a very, very high chance that you will get measles.”

—Dr Emma Best, Paediatric Infectious Disease Specialist

Dr Best explained that the sequential appearance of new cases among close contacts of an initial traveller was “unfortunately expected.” The virus “seeks out” unvaccinated individuals, particularly young children, she added.

Global Travel a Risk Factor

With measles circulating in numerous countries, including Canada, Australia, parts of the United States, and Southeast Asia, Dr Best stressed the importance of vaccination for travellers. Auckland experienced its own measles outbreak earlier in the winter, underscoring New Zealand’s vulnerability.

New Zealand’s relative success in containing measles so far is due to sustained vigilance rather than luck, according to Dr Best. However, she cautioned that with the virus prevalent globally, any traveller returning from almost anywhere in the world carries a potential risk.

The World Health Organization reported over 300,000 measles cases globally in 2023, a significant increase from the previous year (WHO, 2024).

Vaccination Remains Key Defense

Preventative measures in New Zealand include routine MMR vaccinations at 12 and 15 months. For infants travelling abroad, early vaccination is possible to provide protection before the standard schedule, Dr Best noted.

Dr Best expressed concern over hospitalizations from preventable diseases like measles, especially given the availability of vaccines. She acknowledged a dip in vaccination rates post-COVID-19 but emphasised ongoing efforts to promote immunisation and open communication.

Parents planning international travel with young children are urged to ensure their children are fully vaccinated. Discussing early measles vaccination for infants under one year old is crucial for those facing air travel and transit risks.

Travellers should also remain vigilant for measles-like rashes upon their return, reinforcing the need for preparedness and awareness.