Do cost-effective length and timing of school closure during an influenza pandemic depend on the severity?
There is no fixed timing and duration of school closure that can be recommended as universal guideline for different types of influenza viruses. The effectiveness of school closure depends on the transmission dynamics of a particular influenza virus strain, especially the virulence (i.e. the infection fatality risk).
Anemia is frequently present in patients with COPD and there is evidence that it is associated with lower whole body bone mineral density.