There is no-fee open access publishing options available to scholars with a type of open access known as Green Open Access publishing, which is essentially, self-archiving. Green OA options at JHU can be found under "JHU Publishing Agreements Supporting OA" on the menu and under "Green OA".
In self-archiving you are depositing either a version of your manuscript, often the Author’s Accepted Manuscript (AAM,) or a preprint, into an online repository like PubMed Central/Figshare/Dryad etc. or preprint server like bioRxiv.org or medRxiv.org – note, it’s important that you get permission from your publisher to self-archive an AAM or preprint; some will allow self-archiving of AAMs within an embargo period while others will allow self-archiving AAMs upon publication. There may be some publishers who will not publish your manuscript if you have already deposited your preprint in a preprint server without their permission.
If you decide to go down the route of preprint deposits into a preprint server, there is a preprint peer review service that Hopkins supports called Peer Community In (PCI). When a preprint is peer reviewed and approved by PCI, it can be expedited for publication in one of PCI’s Diamond OA journals or the publication process can be expedited (i.e., the peer review process may be shortened or eliminated) for certain publishers that PCI has a relationship with or that are considered “PCI-friendly”.
There are two ways of self-archiving:
