1) Surya Grahan & Shoola Yoga - 26.12.2019
2) Chandra Grahan - 15.02.2020
3) Shani Transit in Makar - 24.02.2020
4) Magal-Ketu conjunction in Dhanu - 24.02.2020
5) Mangal Guru Conjunction in Dhanu - 20.03.2020
7) Mangal Pluto conjunction - 22.02.2020
8) Shukra swagrahi in Vrishab - 28.03.2020
9) Guru transit to Makar Rashi - 30.03.2020
10) Mangal Shani conjunction - 31.03.2020
11) Guru Pluto conjunction - 04.04.2020
13) Surya transit into Mesh Rashi - 13.04.2020
14) Shani retrograde in Makar - 11.05.2020
15) Shukra retrograde in Vrishab - 13.05.2020
16) Guru retrograde in Makar - 14.05.2020
17) Rahu changes Nakshatra to Mrigahsira - 20.05.2020
19) Mars transit to Meen Rashi - 18.06.2020
20) Sun breaks Kaal Sarp Yog in transit - 20.07.2020
20) Rahu Ketu Axis change to Vrishab-Vrischik on 23.09.2020
These are just transit & gochar to look for from #COVID2019 point of view
In addition there two Grahans & Retro Motions, Nakshatra Change which is a very detailed thing to sum it up on Twitter.