A new poll for The Sunday Times found hospitals and the health service were the biggest issue for voters this month.
As the flu epidemic intensified in the first half of January, nearly seven out of 10 voters OR 68% said that issues in the health service would influence their vote if there were a general election in the morning.
The next biggest issue was homelessness and the lack of local authority housing, which was a concern for 50% of those polled.
The results of the B and A Poll show Fine Gael has dropped two points but remains six clear of Fianna Fail - There's no change for Fianna Fail on 26%.
Sinn Fein and Labour are both up a point to 18% and 6% respectively - while other parties remain largely unchanged.
Leo Varadkar retains the highest leaders' rating at 52%.
Fine Gael has taken a slight dip in support in the latest opinion poll published this morning.
The first Sunday Times / Behaviour & Attitudes poll for 2018 shows support for the party is down two points to 32%.
There was no change for Fianna Fail on 26%
Sinn Fein and Labour are both up a point to 18% and 6% respectively - while other parties remain largely unchanged.
Sunday Times/Behaviour & Attitudes poll
— John Burns (@JohnBurns43) January 20, 2018
Fine Gael 32% -2
Fianna Fail 26% n/c
Sinn Fein 18% + 1
Independets & Others 18% -1
Labour 6% +1
* correction to earlier tweet. SF up one, not down one
The poll was conducted among 1,000 voters nationwide between 4-16 January.