Now is not the time to abandon all Covid caution

Analysis: scientists say the Delta variant should make the government think twice about resting all its hopes on vaccines If the new health secretary is to be believed, we are about to embark on an “exciting new journey” come 19 July. Sajid Javid, like the prime minister, appears confident that restrictions will be lifted irreversibly on that date. The data, however, is beginning to tell a different story.When Boris Johnson said his government would be guided by “data, not date