Halakhah su Berakhot 6:11

If wine comes to them in the middle of a meal, each person says the blessing for himself, since the throat may not be empty (when it comes), but after the meal, one person says the blessing for all.⁹⁰B.Berakhot 43a; Tur and Orah Hayim 174:8. The explanation: The throat may not be empty because all the diners are involved in eating, and some may not hear the blessing, or be paying attention or listening. That is how Rashi z”l explained it. So by this logic, if they all were to stop eating and listen, one person could say the blessing for himself. And there is someone who explained that even if they were listening and each one says the blessing for himself – because they are not able to reply “Amen,” since anyone who was chewing something in their mouth might swallow something down the wrong pipe.⁹¹Tur. And this is the view of the Jerusalem Talmud, where their version says, “’The throat may not be empty.’ Rabbi Muna said, ‘If someone sneezes during a meal, it is forbidden to say to him ‘asuta,”⁹²The Aramaic equivalent to our “Gesundheit.”since that might endanger his life.”⁹³Y.Berakhot 6:6. That is, dangerous for the one saying “asuta,” since he might choke while eating and talking at the same time.