During this period, it's very difficult to go out to take advantage of the experience that Pokémon GO offers, however Niantic makes efforts to allow their community of players to continue enjoying the game without going out.
Every Monday for three weeks, a box of objects is available for the modest price of a single coin. After the incense, and the 100 Poké Balls last week, it's Great Balls' turn to be part of this offer.
Note that this offer changes every Monday so you have until next Monday to collect your 50 Great Balls .
Niantic has also announced measures to allow players to participate in raids from home but for the moment we don't have more details. Other measures will also be applied such as a new way to enjoy the Pokémon GO Festival or even an improvement for Adventure Sync in order to recover the rewards without going out. You can find the Niantic press release on their official website.