Eintracht Braunschweig and VfL Bochum have both announced returning players over the past few days, with VfL Osnabrück making a double swoop as well.
The entire team had been told to isolate after the cases were confirmed, however the club said in a statement that only a handful of players had to remain in quarantine.
He moves to the Millerntor after a breakthrough season with the Zebras, contributing 11 goals and 5 assists although the side eventually fell away from a promotion place.
They have signed Japanese defender Sei Muroya, cancelled the contract of former captain Marvin Bakalorz and extended with Marlon Sündermann.
The 31-year-old has signed from relegated side SV Wehen Wiesbaden.
Despite only rejoining the club last summer and having a contract until 2023, Zieler was unceremoniously told he would play no further part in Kenan Kocak’s plans in the upcoming season.
The 26-year-old left Der Club earlier in the summer after becoming surplus to requirements, and has now signed a two-year contract with the Lower Saxony club.
Rapp will spend a further season on loan with Darmstadt from Union Berlin; Führich joins from Borussia Dortmund.
Klewin arrives from 2. Bundesliga champions Arminia Bielefeld whilst Gnjatic was previously with Polish Ekstraklasa side Korona Kielce.
Würzburger Kickers have made five signings in four days as they continue to strengthen their side ahead of their 2. Bundesliga return.