If you're looking for scholarly literature on COVID-19, try looking in one of these science databases. Note that you might need to use multiple terms: people refer to the disease as COVID-19, coronavirus, and SARS-CoV-2. To capture all of these terms at once, search for COVID-19 OR coronavirus OR SARS-CoV-2.
Also, some publishers have made COVID-19 related content freely available. Feel free to check out these sources as well.