SOLVED. Book with a cover in which a boy and a girl in yellow clothes are looking at each other in a white background. [s]

[mai]

I have not read this book before, so I only know vague details
most likely this book takes place in a modern/dystopian society with an illness/disease they need to take care of, the people on the cover try to figure out the problem/secrets. The title starts with the word "the"

[☯ DαякєηRнαℓ ❛ ᶜʳᵒᵘᶜʰᶤᶰᵍ ʰᵘᵐᵃᶰ ; ʰᶤᵈᵈᵉᶰ ᵗᶤᵗᵃᶰ ❜]

[Andria]

Yep, that was my first guess, too.

[mai]

Yes! That's it thank you!!!!

[☯ DαякєηRнαℓ ❛ ᶜʳᵒᵘᶜʰᶤᶰᵍ ʰᵘᵐᵃᶰ ; ʰᶤᵈᵈᵉᶰ ᵗᶤᵗᵃᶰ ❜]

Congrats and enjoy!