That’s a good question. But I doubt that it does because only vaccines train your own immune system. The article says that the antibody therapy only lasts for a few weeks. If it trained your immune system it would last for years.
“But I doubt that it does because only vaccines train your own immune system.”
The virus itself trains the immune system. All that a vaccine is is a sort of simulated virus, a relatively harmless virus look-alike that fools the immune system to think it’s the real thing.
If you can keep the virus from killing you by using the antibodies, but keeping enough of them around so the immune system gets sensitized to it, then you become immune. It would be like you taking a vaccine.
All the people that survive this virus will have done so because their immune system was able to manufacture antibodies fast enough and in sufficient quantities to destroy the invader. And my guess is that even the people that don’t survive might have built a certain level of resistance, but not enough to overcome the virus.