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Influenza monthly update, June 2018

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In the WHO Eastern Mediterranean Region, influenza activity continues to decrease in the month of June in many countries reporting data to FluNet and EMFLU namely, Afghanistan, Bahrain, Egypt, Islamic Republic of Iran, Iraq, Jordan, Kuwait, Lebanon, Morocco, occupied Palestinian territory, Pakistan, Qatar, Saudi Arabia, and Tunisia (Fig 1).

Fig_1_map

Fig 1. Influenza geographic spread in the Eastern Mediterranean Region, June 2018

Influenza activity by sub-type

In June 2018, no new cases of human influenza A(H5N1) were reported in Egypt. In the northern Africa influenza transmission zone, Egypt reported sporadic co-circulation of all seasonal influenza viruses; while Morocco and Tunisia reported no activity. In the Western Asia influenza transmission zone, influenza A(H1N1)pdm09 was detected with influenza B virus in Bahrain. Kuwait, Lebanon and oPt reported circulation of influenza A(H1N1)pdm09 and influenza B; while Qatar and Saudi Arabia reported co-circulation of all seasonal influenza viruses. In southern Asia transmission zone, Afghanistan and Islamic Republic of Iran reported no influenza circulation; Pakistan reported sporadic circulation of influenza B.

Source of transmission zones

Fig 2 shows the weekly distribution of influenza subtypes.

Fig_2

Source: FluNet and EMFLU

Fig 2. Weekly positive cases of influenza by subtype, Epi week 26/2017–2018

Circulating influenza viruses by subtype

During June 2018, national influenza centres and influenza laboratories in the Region tested a total of 4117 specimens for influenza viruses of which 303 tested positive (7%). The average percentage of positivity rates is 5%, with highest positivity rate recorded in Qatar. Of the viruses tested; 263 (87%) were influenza A viruses, including 216 (71%) influenza A(H1N1)pdm09 virus and 20 (7%) were influenza A(H3) virus. Influenza B (Lineage Not determined) virus accounted for 40 (13%) (Fig3).

Fig_3

Fig 3. Circulating influenza viruses in the Region by subtype, Epi week 22-26, 2018

Related report

Influenza monthly update, June 2018

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