The most common viral pathogens in the pandemic (H1N1) 2009–negative samples were from the family Picornaviridae: coxsackie/echovirus (650; 8.65%), and rhinovirus (449; 5.98%) (Table 2).
Although influenza with respiratory manifestation (487.1) was the most common code used among 150 confirmed pandemic H1N1 2009 cases, overall it significantly decreased since the start of the pandemic.
For example, when respondents were asked what will protect you from getting pandemic influenza, the most common response was washing hands, wearing masks and vaccination.
N1, N4, N5 and N8 belong to group 1, while N2, N3, N6, N7 and N9 belong to group 2. N1 and N2 are the two most common serotypes found in epidemic and pandemic influenza viruses.
Interestingly, influenza with respiratory manifestation NEC (487.1) was used significantly less during the early period of the pandemic H1N1 2009 outbreak, however, it was the most common code used among the first 150 confirmed pandemic H1N1 2009 VA cases (61/150, 41%).
Asthma was the most common co-morbidity among patients hospitalized with pandemic influenza A(H1N1 pdm09 [pH1N1] infection.
H275Y has been described as the most common mutation that confers oseltamivir resistance in pandemic (H1N1) 2009 infection and has been found in all the resistant isolates reported worldwide (1 ).
One of the most common interventions in the early weeks of the pandemic was temporary school closure, which was applied at levels ranging from individual schools to local school districts to country-wide closures.
The most common underlying reason for unwillingness or hesitation concerning pandemic H1N1 vaccination was possible side effects, followed by the lack of comprehensive field evaluation before marketing.
Because of this pandemic, S. Enteritidis has become the most common serotype of Salmonella isolated from humans worldwide (11 ).
