What are the requirements for the STV application concerning the medical certificate, return flight, and e-visa delays?

The message inquires about the STV application, specifically regarding the necessity of having a medical certificate in English, whether a return flight is needed, and the delays associated with the e-visa process. Responses indicate that a medical certificate is required and should be in English, a sample is available online, a return flight is not mandatory for the STV visa, and there is some uncertainty about specific delays with the e-visa.