It is estimated that more than one million people in England are currently infected with coronavirus.
'Such irresponsible behaviour poses a significant threat to public health,' the home secretary said.
The PM was under pressure after Priti Patel said she argued for the borders to be shut to international visitors in March last year.
The home secretary says stricter enforcement of the rules is what is required.
Boris Johnson has responded after the home secretary got basic coronavirus rules wrong for the second time in three days.
Patel said on at least six occasions that the rules are 'clear'.
Immigration teams transported COVID-positive asylum seekers across the country during the pandemic, a committee hears.
It has been reported that an exemption allowing protests will be removed from new COVID-19 legislation.
A leading human rights lawyer has said home secretary Priti Patel does not understand her own laws amid continued confusion over the government's 'mingling' ban.
Angry lawyers have attacked the Home Office after it issued 'dangerous' criticism of those helping refugees who have crossed the English Channel.
Priti Patel has said migrants crossing the English Channel should be 'intercepted at sea' and returned to France.
The home secretary has said she wanted to see those who attack police officers and firefighters face up to two years in jail.
The highest estimate of the illegal population in the UK is 1.2 million.
The remarks follow an exchange in parliament about Black Lives Matter and racism.
What do the rules mean and how will they be enforced? Yahoo News UK explains all...
Two-week quarantines will be imposed on new arrivals to the UK from 8 June, with a fine for anyone who breaches the rules.
The home secretary and Labour leader had a heated row in the chamber.
Recent polling has suggested the public's attitude to immigration has softened - but will this trend continue?
Baroness Warsi tweeted her support for Dave’s performance at Tuesday’s music ceremony.
The UK is planning an overhaul of its immigration system after Brexit.
The Duke and Duchess of Sussex are set for crunch talks with the Queen on Monday.
The prime minister was unable to say where claims there would be 52 more murders a year under Labour had come from.
Home Secretary Priti Patel told BBC North West Tonight that poverty isn't necessarily the government's responsibility.
Home Secretary Priti Patel told the Sunday Telegraph she had discussed a points-based immigration system with her Australian counterpart Peter Dutton.
The new PM has made his first appearance in front of MPs.