The second wisest [Babylonian] custom is this: they carry those suffering from illness into the agora, for they have no use for physicians. And coming there to consult with the sick about their illness are any who have suffered from the same disease or who have seen others doing so, consulting and exhorting how they or others flushed out the disease. And it is not permissible to walk past the sick person in silence, before having asked after the illness.
δεὺτερος δὲ σοφίῃ ὅδε ἄλλος σφι νόμος κατέστηκε: τοὺς κάμνοντας ἐς τὴν ἀγορὴν ἐκφορέουσι: οὐ γὰρ δὴ χρέωνται ἰητροῖςι. προσιόντες ὦν πρὸς τὸν κάμνοντα συμβουλεύουσι περὶ τῆς νούσου, ἔι τις καὶ αὐτὸς τοιοῦτο ἔπαθε ὁκοῖον ἂν ἔχῃ ὁ κάμνων ἢ ἄλλον εἶδε παθόντα, ταῦτα προσιόντες συμβουλεύουσι καὶ παραινέουσι ἅσσα αὐτὸς ποιήσας ἐξέφυγε ὁμοίην νοῦσον ἢ ἄλλον εἶδε ἐκφυγόντα. σιγῇ δὲ παρεξελθεῖν τὸν κάμνοντα οὔ σφι ἔξεστι, πρὶν ἂν ἐπείρηται ἥντινα νοῦσον ἔχει.
It is probably for the best that Herodotus didn’t live in the age of the internet.