Table 1. Seasonality and potential gap in availability of Northern and Southern Hemisphere formulations.

		Potential availability gap SH					Potential availability gap NH
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Countries using NH formulation
Afghanistan	x	x	x									x
Burkina Faso		x	x
Burundi		x	x	x	x	x
Congo, DR	x	x	x	x	x							x
Côte d'Ivoire			x			x	x	x	x	x	x
Haiti				x	x	x	x
Korea, DPR	x	x	x	x								x
Kyrgyzstan	x	x	x
Lao, PDR									x	x	x
Mauritania	x	x										x
Niger	x	x
Pakistan	x	x	x									x
Papua New Guinea	x	x	x	x							x	x
Rwanda		x	x	x	x	x
Senegal									x	x	x
Solomon Islands	x	x	x	x							x	x
Sudan	x										x	x
Tajikistan	x	x	x
Yemen	x	x	x									x
Countries using SH formulation
Bangladesh				x	x	x	x	x	x
Cameroon						x			x	x	x	x
Central African Republic								x	x
Gambia									x	x	x
Guinea									x	x	x
Guinea-Bissau									x	x	x
India			x	x		x	x	x	x
Kenya		x	x	x			x				x
Lesotho					x	x	x	x	x
Madagascar	x	x			x	x	x				x
Nepal							x	x
Nicaragua							x	x	x	x	x
Sierra Leone								x		x
Togo	x									x		x
Uganda				x	x			x	x	x	x
Zimbabwe			x				x	x	x	x
Countries using both formulations
Benin	x	x	x			x			x	x	x
Cambodia									x	x	x	x
Chad						x			x	x	x	x
Comoros	x	x			x	x	x				x
Djibouti			x	x						x	x
Eritrea			x	x						x	x
Ethiopia			x	x						x	x
Ghana			x	x		x	x			x	x	x
Liberia			x			x	x	x	x	x	x
Malawi		x	x	x			x	x	x	x	x
Mali	x	x	x						x	x
Mozambique	x	x			x	x	x				x
Myanmar		x					x	x	x	x
Nigeria	x	x	x			x			x	x	x
Sao Tome and Principe	x	x	x	x	x							x
Somalia			x	x						x	x
South Sudan				x	x			x	x	x	x
Tanzania		x		x								x
Zambia			x				x	x	x	x

x Months with influenza virus circulation

Countries for which there is an incompatibility between the assumed period of vaccination and availability of supply

Countries in italics are countries for which seasonality data were extrapolated