Child from Western Australia, adult diagnosed with meningococcus

Meningococcal B vaccine

A toddler and an adult are recovering in Western Australia after being diagnosed with life-threatening meningococcal disease, but the state Department of Health says the cases are unrelated.

There have been 21 reported cases of meningococcal disease so far in WA this year.

A total of 46 incidents were reported in WA last year, which is double the amount reported in 2016 and the highest number in any year since 2005.

It occurs less than a week after another child and a young adult were diagnosed with the disease in separate incidents in Washington.

A child receives the meningococcal vaccine.

(AAP / David Crosling)

The WA Health Department said that previous cases were not linked and people were infected with different types of the organism.

More to come