A temporary testing site has been set up at the Naro Space Center in Goheung County, Jeollanam-do Province, in the southwest of the country.
And lining up are researchers at the Korea Aerospace Research Institute.
They are making final preparations prior to South Korea's first ever independently developed Nuri rocket is launched on Thursday.
"If anyone tests positive for COVID-19 ahead of the launch it could affect the launch, so we are doing this to find potential patients."
With a day left until the launch, the rocket headed to the launcher unit on Wednesday morning, having completed its final assembly.
It marks a milestone achievement after 12 years of hard work.
"It's like I'm taking the college entrance exam. What's different this time is that I feel like I prepared well because I studied hard."
In the meantime, the area around the launch site has been quiet for the past few days, seeing no visitors.
Local residents are just hoping for a successful launch.
"It's a rocket launch that relies solely on Korean technology. It must succeed."
We are so excited because it's a domestically developed rocket, I hope it's a GO at the first attempt
The Nuri rocket is expected to blast off at around 4 PM, Korea time, on Thursday.
The exact time will be announced in the morning.
Lee Kyung-eun, Arirang News.