AS I am student of MSc public health and i don't have much depth knowledge of research, i want to know in much about secondary research methods,.
i choose topic of side effect of antidepressant drug but i am bit confuse about how to get data as in UK during this pandemic time it is hard to get permission from NIHs to collection any kind of data and as new researcher i am still confused how to collect data for primary as well as secondary research.