The EC advisory came a day after Prime Minister Narendra Modi's address to the nation, calling on people to remain careful.
Voting will take place on 28 October, 3 November and 7 November.
While the government maintains there is no sense of panic in Bihar over the disease, experts say the number of daily cases is still high.
Thackeray will have to get elected to either of the two houses of Maharashtra legislature by May 28 to remain in the CM post.
Sharma told the EC that deputy chief minister of Delhi Manish Sisodia was ineligible to quash the mercy plea because the Model Code of Conduct was in place in Delhi when he did.
Delhi High Court has sought response of the AAP government, police and Election Commission on a plea challenging the challan.
The model code of conduct will be applicable in Delhi with immediate effect.
A security flaw in the ECI website put at risk not just the electoral roll, but all the other information gathered about voters as well—potentially putting the personal information of every Indian at risk.
The ease with which the Narendra Modi government ignored apex institutions like the Reserve Bank of India, Election Commission of India, and even Parliament, intensifies the crisis facing the institutions meant to check the untrammeled power of the executive.
A confidential note reveals that finance ministry officials intentionally misled the Election Commission in an effort to dilute its opposition to the electoral bond scheme.