What is the era and who tried to stop it from passing

The ERA is the Equal Rights Amendment, established to guarantee equal rights for women, especially when it came to wage differences between those of the opposite sex. The amendment seemed to fly smoothly until Phyllis Schlafly mobilized conservative women in opposition toward the act. She argued that the act would "disadvantage housewives", but there seemed to be more women for the act, than there were opposing it.   

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.