Please do not forget to bring this document when you get the second vaccine too
Please make sure to bring these documents when you get the second vaccine too
this document=1枚の書類
these documents=複数の書類
please bring this document
この書類をお持ちください
please do not forget to bring this document
必ずこの書類をお持ちください
please make sure to bringもOKですね！
when you get the second vaccine too
２回目のワクチン接種のときにも
ご参考になれば幸いです！
Please be sure to bring this paper with you when you come for your second vaccination.
You'll need to have this document with you at the time of your second vaccination.
ーPlease be sure to bring this paper with you when you come for your second vaccination.
「２回目のワクチンに来る時に、この書類を必ず持ってきてください」
to be sure to ... で「必ず…する」
one's second vaccination で「２回目のワクチン接種」
ーYou'll need to have this document with you at the time of your second vaccination.
「２回目のワクチン接種の時に、この書類を持っている必要があります」
at the time of ... で「…の際に・…の時に」
ご参考まで！
アメリカ合衆国 
カナダ 
