Two people with underlying diseases died on Wednesday after receiving their COVID-19 vaccinations in Gyeonggi Province. 

A 63-year-old patient staying at a long-term care hospital in Pyeongtaek died at around ten a.m. after showing signs of pneumonia and sepsis. The patient, who had a cerebrovascular disease, had received an AstraZeneca shot four days earlier. 

Meanwhile, a 50-something patient staying at a geriatric ward died Wednesday morning following a heart attack, one day after receiving an AstraZeneca shot. This patient was found to have been suffering from underlying diseases, including heart disease, diabetes and stroke. 

Quarantine authorities are investigating whether there is a direct link between the deaths and the vaccines.