function to read data related to covid19 vaccinations
covid19.vaccination(tgt = "global", data.fmt = "orig", disclaimer = TRUE)
tgt
: selects data type: 'global','us','country','locations'data.fmt
: selects the format of the data, options are: 'orig' (original as reported by the OWID repo)disclaimer
: indicates whether the information about the source of the data is disclosedUseful links