Inclusion Criteria:  -Ages Eligible for Study: 18 Years to 65 Years (Adult, Older Adult) Sexes Eligible for Study: All  History of at least 5 attacks of migraine  -≥ 15 headache days of which ≥ 8 headache days meet criteria as migraine days during the baseline period  chronic migraineurs with failure to more than 2 preventive treatments chronic migraineurs without any preventive treatments Naive to anti CGRP monclonal antibodies  Exclusion Criteria:  Participants are excluded from the study if any of the following criteria apply:  • unable to understand the study requirements, the informed consent, or complete headache records as required per protocol;  History of cluster or hemiplegic headache Evidence of seizure or major psychiatric disorder Cardiac or active hepatic disease pregnant, actively trying to become pregnant, or breast-feeding; episodic migraineurs, Other headache types allergy to latex; received nerve blocks or trigger point injections in the previous 8 weeks or plans to receive them during the study; prior exposure in the last 6 months to biologics or drugs specifically targeting the calcitonin gene-related peptide (CGRP) pathway; a psychiatric condition, that may affect the interpretation of efficacy and safety data or contraindicates the participant's participation in the study