In the early 1800s, major health threats included epidemics of smallpox and diphtheria, which had severe impacts on public health. Smallpox vaccination efforts were crucial in reducing its prevalence, while diphtheria caused significant mortality. This era marked the beginning of heightened public health awareness and medical advancements. ;
The statement is true; in the early 1800s, smallpox and diphtheria were major health threats due to their high mortality rates. Vaccination efforts for smallpox began in the late 18th century, while diphtheria remained a serious concern until vaccines were developed in later years. This era marked an important turning point in public health awareness and interventions.
;