Figure 1From: Spillover of pH1N1 to swine in Cameroon: an investigation of risk factorsPresence of pH1N1 at twelve sites in Cameroon. Sites shown by a white point had no positives for any influenza, those shown by a grey or black point had at least 1 positive for pH1N1. Sites indicated by grey points had positive sera, while those indicated by black points had swine shedding the virus at the time of our sampling.Back to article page