Boris Self-Isolating After Fellow MP Tests Positive The Prime Minister was self-isolating last night after Lee Anderson, a Conservative MP with whom Boris had a 35-minute meeting, tested positive. But why has he got to self-isolate, given that he had COVID-19 less than six months ago and even the BMJ admits that T-Cell immunity lasts at least six months? The MailOnline has an explanation. It is possible to contract COVID-19 twice, with five confirmed cases of reinfection reported globally as of last month.Tests have shown that many people who recover from COVID-19 do have antibodies which can produce future immunity.But not enough is known about whether protection is long-term as the virus has only been known to science for less than a year.Even if a patient is asymptomatic, they may still be able to pass on the virus to people they are in close contact with. But hang on. If having had COVID-19 less than six months ago doesn't give you immunity, what hope is there for a vaccine? The BioNTech/Pfizer vaccine is already a two-parter. Will we be expected to have a booster every few months as well? As the MailOnline points out, the telephone call from NHS Test and Trace couldn't have come at a worse time for the Prime Minister who is hoping to relaunch his Government ...