It could be clearer sure but for what it's worth I understood it mostly okay, that it was a package from Matt, containing supplies to get him ready and including a negative test result of the boy - it is ambiguous or maybe even I missed it, but implied Matt has secretly sent the boy's labs away to ensure he was negative still.
Structurally could add more depth here to strengthen it. All that said, I am loving your way of writing and flow so far. I enjoyed the OP but you are taking it narratively and descriptively to the next level. Highly anticipating the next part!
