Pfizer boss Dr Albert Bourla has tested positive for Covid for the second time in a month.
The 60-year-old — who has been vaccinated four times with his company’s shot — last had the virus in mid-August.
He revealed on Twitter Saturday he had tested positive again but was ‘feeling well and symptom-free’.
Dr Bourla revealed he had not yet had Pfizer’s new bivalent vaccine which is designed to work better against Omicron variants.
He used his back-to-back positive tests to warn people not to be complacent, adding: ‘While we’ve made great progress, the virus is still with us.’
It is unusual for someone to catch Covid twice in such a short time period as natural infection is thought to provide strong protection for several months.
A faulty test or leftover virus from the previous infection are normally the reasons people test positive in quick succession.
However, a small number of people do suffer genuine reinfections within short time periods.
Dr Bourla said he had not got his fifth vaccine because Centers for Disease Control and Prevention (CDC) guidelines say people should wait three months after a Covid infection.
During his infection last month, the CEO was given a course of Pfizer’s oral Covid antiviral treatment Paxlovid.
In his tweet on Saturday, Dr Bourla said: ‘I have tested positive for Covid. I’m feeling well & symptom free.
‘I’ve not had the new bivalent booster yet, as I was following CDC guidelines to wait three months since my previous Covid case which was back in mid-August.
‘While we’ve made great progress, the virus is still with us.’
The comments appear to be in reaction to President Joe Biden’s comments last week that the Covid pandemic is ‘over’.
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