Although the sparrow campaign ended in disaster, the other three anti-pest campaigns may have contributed to the improvement in the health statistics in the 1950s.[18]
Seems the birds may have been the only screw up. No harm reported from the mosquitos, flies, and rats.
TIL https://en.m.wikipedia.org/wiki/Four_Pests_campaign
Seems the birds may have been the only screw up. No harm reported from the mosquitos, flies, and rats.