*There’s bad news and good news for Robin Roberts fans.

The extremely popular “Good Morning America” personality won’t be able to re-join the show until at least May and maybe even June, 2013.

Robin’s medical issues make an earlier return way too risky, because her immune system is extremely weak, sources tell TMZ.

RELATED STORY: GMA’s Robin Roberts ‘Not Feeling Well’; Leaves During Show (Video)

On the other hand, her doctors are pleased with her progress and say she’s right on schedule which means she’ll be sidelined for 5 or 6 months.

Meanwhile, Robin’s fans are showing their love for her by sending well wishes — cards, emails, etc — by the truckload, so to speak.