LONDON - Immunity to coronavirus may only last for a few months after infection, according to new research findings that point to another obstacle to rolling out a vaccine.

Major research suggests that even if a successful vaccine is found, it might need to be administered twice a year

The percentage of the United Kingdom (UK) population who have developed Covid antibodies had fallen by a more than a quarter since June to fewer than one in 20 people in the UK as of last month, the Imperial College London (ICL) study suggests.

The researchers say the “rapid” deterioration in immunity means that any successful vaccine may need to be administered twice a year unless the jab proves more powerful than natural immunity, The Telegraph reports.