UPDATE 2-FTSE 100 propped up by AstraZeneca, snaps three-week losing streak
* AstraZeneca tops FTSE 100 on Russian vaccine deal* Focus turns to quarterly earnings updates* Burberry underperforms FTSE 100 peers for the week (Adds graphic, updates to close)By Shashank Nayar and Ambar WarrickJuly 17 (Reuters) - The FTSE 100 re...
