I heard that teenagers will have the chance to get vaccinated from this week onwards and students who get vaccinated can take 3 days off school, but it doesn't sound like good news to me.
I’m a little bit against my kid getting vaccinated because of the vaccine's side effects. I also have concerns about how she would make up for the classes she would be missing because students who get vaccinated will take different days off.
Great job, Mari Kim! You're making good use of phrasal verbs and you are writing longer sentences with mostly accurate grammar too.
A couple of small changes -
In the first sentence, the time phrase 'from this week' sounds best with a future tense.
I changed 'it didn't sound like good news' to simple present because it's something still true now.
I changed 'its' to 'the vaccine' because otherwise the subject was a little unclear.
Finally, I changed the pronouns in the last sentences because we had 'they' and 'she' referring to the same person. It would be best to keep them all the same (either they or she).
Overall, very clear though already! Let me know if you have any questions.