The Efas proposal is facing increasing opposition, particularly among left-leaning voters, according to a recent survey conducted by the JRC Bern research institute.
The survey reveals that 54% of participants would support the proposal if a vote were held at that time, but there has been a decline of 7 percentage points since the first survey.
The "no" camp has gained 11 percentage points, resulting in a 17 percentage point lead for the "yes" camp.
The survey also highlights a significant ideological divide, with supporters of the Social Democratic Party (SP) and environmentally conscious voters shifting towards the "no" camp.
There is also a gender gap, with female respondents showing increased skepticism compared to male participants.
Social class also plays a role, with the majority of individuals from lower middle-class backgrounds opposing the proposal.
Geographically, French-speaking regions exhibit higher levels of skepticism.
Concerns about the financial implications of the proposal, such as loss of control over the healthcare system and potential premium shocks, are also influencing opinions.
The evolving sentiments among voters suggest that the "yes" camp may face challenges in maintaining its lead as the voting date approaches.