Well the article oversimplifies the linked source quite a bit in my opinion:
The article says
>Volunteers experimentally inoculated with HCoV-229E showed a steep decline in antibody response over time, and the majority could be successfully reinfected a year later.
while the linked source for that 1990 study says that while the 10 study participants were reinfected, none of them developed colds a second time, and the virus shedding period was much shorter.
The article says
>Volunteers experimentally inoculated with HCoV-229E showed a steep decline in antibody response over time, and the majority could be successfully reinfected a year later.
while the linked source for that 1990 study says that while the 10 study participants were reinfected, none of them developed colds a second time, and the virus shedding period was much shorter.