How Is Working Remotely (At Home) Virus/Hack-Proof?

A couple of questions that have been on my mind since the beginning of the COVID-19 pandemic, which I've not yet seen asked or answered, are:

1. How will individuals, working from home for any company, ensure that their home computers are as virus/hack-proof and secure as their business ones?
2. And, why should customers trust that these companies' platforms or on-line services are safe/secure, as a result?

Source: CNBC

Perhaps investors of FB are also beginning to wonder about those issues, as well, as it's poised to take a tumble after breaking out to new highs, following a gain of almost 60% from its March 18 low.