
A letter addressed to a London, Ont., mother in 1967 is providing new insight into how a measles vaccination campaign rolled out more than five decades ago in the southwestern Ontario city.
from CBC | Canada News https://ift.tt/32IRrUg
A letter addressed to a London, Ont., mother in 1967 is providing new insight into how a measles vaccination campaign rolled out more than five decades ago in the southwestern Ontario city.
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