Hi

Your jee mains 2nd session examination has already been postponed and delayed a lot due to coronavirus outbreak and lock down caused by it from its scheduled date

Your JEE mains second session has been scheduled  to be conducted on 18th, 19th, 20th, 22nd and 23rd July

Your jee mains examination is not expected to be delayed more as proper safety measures are going to be taken to conduct the exam but in the worst case of virus spread if it gets postponed again then NTA will notify you about it in advance so you don't need to worry about it .

Thus, you  need to prepare well for jee mains examination date considering 18th- 23rd July as your examination date

Thank you