Vajpayee was hospitalised at All India Institute of Medical Sciences, Delhi (AIIMS) for a chest infection and fever on 6 February 2009. He was put on ventilator support as his condition worsened but he eventually recuperated and was later discharged. Unable to participate in the campaign for the 2009 general election due to his poor health, he wrote a letter urging voters to back the BJP. His protege Lalji Tandon was able to retain the Lucknow seat in that election even though the NDA suffered electoral reverses all over the country. It was speculated that Vajpayee's non-partisan appeal contributed to Lalji's success in Lucknow in contrast to that BJP's poor performance elsewhere in Uttar Pradesh.