Awal Pertama Kali Covid-19

https://www.pikiran-rakyat.com/nasional/pr-011520700/setahun-pandemi-covid-19-menilik-perjalanan-pelik-kasus-virus-corona-di-indonesia?page=3

https://www.halodoc.com/artikel/kronologi-lengkap-virus-corona-masuk-indonesia

https://megapolitan.kompas.com/read/2021/07/01/13450411/ppkm-darurat-di-jakarta-berlaku-mulai-3-juli-simak-bedanya-dengan-ppkm?page=all

https://www.kompas.com/tren/read/2020/12/07/190200765/diperpanjang-lagi-berikut-perjalanan-psbb-di-jakarta?page=3

https://kesehatan.kontan.co.id/news/inilah-10-varian-baru-virus-corona-hasil-mutasi-kenali-gejala-dan-cara-mencegahnya?page=all