Tech firms proposing designs for UK COVID-19 immunity passports are mulling a 'shared database' to track cases across borders

· Senior execs at two ID verification startups have suggested creating a new "shared database" to track COVID-19 cases across borders. 
· There has been widespread speculation the UK could roll out such passports in the next 12 months, as Boris Johnson seeks to end the nation's strict lockdown.  
· In a public post on...