See this link. Their introductory blurb follows:
The Frontiers Coronavirus Knowledge Hub provides an up-to-date source of trusted information and analysis on COVID-19 and coronaviruses, including the latest research articles, information, and commentary from our world-class scientific community.
Frontiers has also waived Article Processing Charges (APCs) and established a priority peer-review process for manuscripts submitted in response to the COVID-19 pandemic. This will further help ensure robust scientific research becomes openly available as soon as possible, for other researchers to build on and to enable evidence-based and factual decision-making for public authorities worldwide.
As we pull together as a community – calmly, responsibly, and resolutely – during the COVID-19 outbreak, we are keen to hear from you. Please do not hesitate to send your ideas for new research directions, stakeholder engagement and initiatives around coronavirus and the current global health crisis.