Isea Raúl, A Missing Data on Covid-19 Forecasts, International Journal of Coronaviruses, Volume 3, Issue 2, 2021, Pages 27-31, ISSN 2692-1537, https://doi.org/10.14302/issn.2692-1537.ijcv-21-3918. (http://oap-journals.infoijcv/article/1685) Keywords: Covid-19; Forecasts; Granger causality; Country; model