Before we start discussing Google Ads policies for COVID-19, it’s a good idea to hear it right from the horse’s mouth. Here is the response they have posted on their support website:
The impact of coronavirus disease (COVID-19) is evolving every day and we are working hard to maintain a safe advertising ecosystem for users, advertisers, and publishers…We will continue to evaluate the situation to both address new products/services that are being used to exploit users, as well as re-enable certain products/services when the situation stabilizes.
To translate, Google is trying to remain very vigilant regarding the products and services being advertised. Particularly, Google is interested in stopping unscrupulous advertisers from price gouging products, like face masks that are vital for healthcare workers, or otherwise exploiting the crisis for profit.