@subaby1 - This year will not be the same as previous years. You probably wont be able to participate in competitive research programs available to HS juniors this summer. But, it is possible to innovate and do something different. There are some alternative options -
Like @GoldenRock mentioned there are lots of online volunteering for organizations impacted by COVID-19. Searching in google is sure to result in lots of opportunities. Small businesses are impacted and could use free volunteers to help with various types of jobs. I am encouraging members of my family also to help out this summer.
Also, there are online summer college level courses that you could take.
Like @grtd2010 mentioned, you could prep for SAT I & SAT II tests. You could even get ahead with your essay writing. Some common essays are -
Why medicine - why do you want to be a Doctor?
Why do you want to join a particular college or specifically a BSMD programs?
Be on lookout - Colleges start publishing essay prompts during the summer itself…