He was admitted to the All India Institute of Medical Sciences (AIIMS) in the evening hours of Friday at the emergency ward after he complained of fever and drowsiness.
Pahadia had served as the Chief Minister of Rajasthan from June 1980 to July 1981 and he was the first Dalit to serve as the Chief Minister in one of India's largest states.
Last week, a community health center in the Kandhla area of Shamli in western Uttar Pradesh had inoculated rabies vaccine for three women, who had come to receive COVID-19 vaccines.
As NDA survived from the debacle through BJP's resounding victory, it stirred speculations that BJP would claim the office of the Chief Minister with more numbers in the alliance.
Rahul Gandhi said that the motive of demonetization and lockdown was the same and it was aimed at destroying small farmers, small businesses, traders, and laborers.
The development has come at a high time when the state is just a week ahead of the assembly elections in which the state ruling BJP has been hoping to retain the power.