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73
is no doubt that the disease is contagious. 2. Isolated cases
precede a general infection of the community. 3. The part
played by contagion in the spread of the disease is most important.
4. There is some evidence in favour of spread of
influenza by goods. 5. Influenza is not spread in England
by a preliminary " contamination of the atmosphere," but
the atmosphere is contamiated by individuals who suffer
from influenza.
The following tables (A.) of deaths, classified according to
diseases, ages, and localities, and (B.) of population, births,
and of new cases of infectious sickness, are prepared in
accordance with the requirements of the Local Government
Board.