▶▶ Pod 153 - Report:

The machine lifeforms not only infected the YoRHa soldier units on the ground, they also infected the <Bunker> with a viral attack, activating a self-destruct sequence.

With this, the 13th Orbital Satellite Base <Bunker> was destroyed. 

2B and 9S avoided infection from the virus and escaped the Bunker before it was destroyed. 
Proposal: Find the remaining surviving YoRHa Soldiers and start another descent-to-ground operation on Earth to fulfill the mission.
Alert. If virus is not eliminated, YoRHa Unit 2B
will sustain serious damage.
‫إنذار. إن لم نقض على الفيروس،
‫فستصاب وحدة اليورها 2.بي بضرر خطير.‫
Warnung: Ohne Bereinigung des Virus
wird Einheit 2B schweren Schaden nehmen.
Advertencia. Si no se elimina el virus,
Advertencia. Si no se elimina el virus,
Alerte,
Attenzione:
Alerta. Se o vírus não for eliminado,
a unidade YoRHa 2B sofrerá um dano profundo.
Тревога. Если не удалить вирус,
2B получит серьёзные повреждения.