The World Health Organization published the following in a Friday Disease outbreak news:
On 20 March 2018, the National International Health Regulations focal point for the Netherlands notified WHO about a human infected with a new reassortant A(H1N2) of seasonal influenza viruses that was detected in the routine sentinel influenza surveillance for influenza-like illness and other acute respiratory infections in the Netherlands.
The patient is a child aged less than two years old, who had onset of symptoms in early March 2018. He was seen by a general practitioner, but did not require hospitalization and has fully recovered.
The general practitioner who attended to this case participates in the sentinel influenza surveillance network. With permission from the parent accompanying the child, nose and throat swabs were collected for virus detection. On 18 March, the Dutch National Influenza Centre (NIC), which is a collaboration of the Erasmus University Medical Center in Rotterdam and the National Institute for Public Health and the Environment (RIVM) in Bilthoven, reported that the patient was confirmed to be infected by an A(H1N2) influenza virus by real-time polymerase chain reaction (RT-PCR). Sanger sequencing of the haemagglutinin (HA) and neuraminidase (NA) genes, and full genome sequencing revealed that the virus is a reassortant A(H1N2) of seasonal influenza viruses, and is made up of genes from currently circulating seasonal influenza virus subtypes A(H1N1)pdm09 (the haemagglutinin [HA] and the nonstructural [NS] protein genes) and A(H3N2) (the rest of the genes).