Dating the emergence of pandemic influenza viruses dating scammers phone numbers
initiated surveillance in 1976 and provided viruses and R.
Correspondence and requests for materials should be addressed to A. This virus has the potential to develop into the first influenza pandemic of the twenty-first century.
Preparations for production and distribution of a vaccine against the H1N1 S-OIV are under way, but the vaccine's efficacy and the timing of its availability in relation to the peak of the pandemic remain uncertain.
Intercontinental virus movement has led to reassortment and lineage replacement, creating an antigenically and genetically diverse virus population whose dynamics are quantitatively different from those previously observed for human influenza viruses.