The graph illustrates the influence of vaccinations on the frequency of a childhood illness named whooping cough, from 1940 to 1990.
It is clear that
during the first 15 Linking Words
years
, the number of the disease incidence was significantly Use synonyms
higer
Correct your spelling
higher
campared
to the following Correct your spelling
compared
years
. Use synonyms
Overall
, with the increase in vaccinations, the Linking Words
cases
of whooping cough became a very rare phenomenon.
Focusing first on the period when the vaccine was Use synonyms
abcent
, in 1940, the number of ill children was nearly 60,000, Correct your spelling
absent
while
over two Linking Words
years
, Use synonyms
this
figure skyrocketed to the level of 170,000 Linking Words
cases
. Use synonyms
However
, by 1945, we can see a significant decrease in Linking Words
this
proportion to its initial level, with its following increase Linking Words
to
160,000 to 170,000 by 1955.
As for the period when the vaccination started, in 1955, there were Change preposition
from
approximatly
90,000 Correct your spelling
approximately
cases
reported, Use synonyms
while
between 1965 and 1970, when over 80% of children were vaccinated, the level of illness fluctuated from 0 to 20,000 Linking Words
cases
, with its following rise throughout the next 10 Use synonyms
years
by roughly 40,000 incidents, when only 30% of children received a dose of a vaccine. Use synonyms
Regardig
the remaining Correct your spelling
Regarding
years
, Use synonyms
while
the vaccine was taken by almost over 90% of Linking Words
child
population, the Add an article
the child
desease
disappeared.Correct your spelling
disease
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