What was the life expectancy in the early 1900's? - Under the age of 50, with a 25% child mortality

rate.

When was the first vaccine created? - 1880

____________ _____________ can reduce life expectancy dramatically, due to the lack of

__________________. - INFECTIOUS DISEASES can reduce life expectancy dramatically, due to the

lack of CONTROL.

Upon early discover, microbes were viewed as? - Enemies, until used in medicine.

What are the beneficial roles of microbes? - - waste breakdown/f...
Pearson Edexcel International GCSE (9–1) 4BI1/1BR 4SD0/1BR Biology UNIT: 4BI1 Science (Double Award) 4SD0 PAPER: 1BR QP + MS JUNE 2024
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