Data
https://ourworldindata.org/coronavirus-source-data
https://systems.jhu.edu/research/public-health/ncov/
Packages
Leaflet :An open-source JavaScript library for mobile-friendly interactive maps
leaflet.extras :Extra Functionality for ‘leaflet’ Package
dplyr : Dplyr is a grammar of data manipulation
DT : An R interface to the DataTables library
flexdasboard : Easy interactive dashboards for R
xts : Time Series in R
sqldf : SQL in R
collapsibleTree : Create Interactive Collapsible Tree Diagrams in R