▁The ▁V at ican ▁Cur ia ▁has ▁said ▁that ▁for ▁v acc ines ▁origin ating ▁from ▁emb ry onic ▁cells , ▁C athol ics ▁have ▁" a ▁grave ▁responsibility ▁to ▁use ▁alternative ▁v acc ines ▁and ▁to ▁make ▁a ▁cons cient ious ▁ob jection ", ▁but ▁concluded ▁that ▁it ▁is ▁acceptable ▁for ▁C athol ics ▁to ▁use ▁the ▁existing ▁v acc ines ▁until ▁an ▁alternative ▁becomes ▁available . ▁ ▁In ▁the ▁United ▁States , ▁some ▁parents ▁claim ▁fake ▁religious ▁exem ptions ▁when ▁their ▁real ▁motiv ation ▁for ▁avoid ing ▁v acc ines ▁is ▁supposed ▁safety ▁concerns . ▁There ▁are ▁currently ▁only ▁three ▁states ▁( Miss iss ippi , ▁West ▁Virginia , ▁and ▁California ) ▁that ▁do ▁not ▁provide ▁exem ptions ▁based ▁on ▁religious ▁belief s . ▁ ▁Altern ative ▁medicine ▁ ▁Many ▁forms ▁of ▁alternative ▁medicine ▁are ▁based ▁on ▁philosoph ies ▁that ▁opp ose ▁v acc ination ▁( including ▁germ ▁theory ▁den ial ism ) ▁and ▁have ▁pract ition ers ▁who ▁voice ▁their ▁opposition . ▁As ▁a ▁consequence , ▁the ▁increase ▁in ▁popular ity ▁of ▁alternative ▁medicine ▁in ▁the ▁ 1 9 7 0 s ▁plant ed ▁the ▁seed ▁on ▁the ▁modern ▁anti - v acc ination ▁movement . ▁More ▁specifically , ▁some ▁elements ▁of ▁the ▁chi rop ract ic ▁community , ▁some ▁home op ath s , ▁and ▁nat urop ath s ▁developed ▁anti - v acc ine ▁r het or ic . ▁The ▁reasons ▁for ▁this ▁negative ▁v acc ination ▁view ▁are ▁complicated ▁and ▁rest ▁at ▁least ▁in ▁part ▁on ▁the