Aedes aegypti is a highly specialized mosquito species feeding predominantly on humans and breeding in artificial water holding containers in urban areas, and currently restricted to subtropical and tropical areas. Williams et al. focus on the reasons why Ae. aegypti once occurred in locations where the mosquito does not occur anymore in Australia, the more temperate drier parts of the country.
The heptavalent pneumococcal conjugate vaccine (PCV7) targets seven of the more than 92 pneumococcal serotypes. Concerns have been raised that non-vaccine serotypes (NVTs) could increase in prevalence and reduce the benefits of vaccination. Indeed, among asymptomatic carriers, the prevalence of NVTs has increased substantially, and consequently, there has been little or no net change in the bacterial carriage prevalence.
The first annual meeting of the European hepatitis B and C surveillance network takes place on 23-24 March 2011. Since 2009, ECDC has worked on preparing the enhanced surveillance of hepatitis B and C at EU/EEA level by establishing a network for hepatitis B and C surveillance and by carrying out a survey on prevention and surveillance activities in the Member States.