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Circus performers of the Association of Circus Proprietors outside Downing Street, London. The association handed a petition to Prime Minister Boris Johnson urging him to allow circuses to reopen. EPA
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A lab technician holds a PCR plate to perform Covid-19 tests at Hermes Pardini Lab amid the pandemic in Vespasiano, Brazil. Getty Images
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Brazilian President Jair Bolsonaro speaks to media at Planalto Palace in Brasilia. AFP
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New South Wales police officers speak to drivers trying to cross from the state of Victoria into NSW at a checkpoint after the border was closed, in Albury, Australia. Reuters
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Security forces use shields during a protest against a lockdown planned for the capital this weekend in Belgrade, Serbia. Reuters
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A Reuters photographer holds a picture of revellers at the running of the bulls at the San Fermin festival, taken in July 2019, in front of the bullring, as a Spanish apprentice bullfighter trains at the arena during what would be the second day of the cancelled event, in Pamplona, Spain. Reuters
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Nuria Bosch, 29, and Dria Abramson, 29, eat lunch in a social-distancing greenhouse dining pod, in the former car parking of the Lady Byrd Cafe in Los Angeles, California. Reuters
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A woman who is suspected of having Covid-19 sits outside El Norte Hospital, La Paz, Bolivia. Reuters
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Circus performers of the Association of Circus Proprietors outside Downing Street, London. The association handed a petition to Prime Minister Boris Johnson urging him to allow circuses to reopen. EPA
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/OXMQ2N4NJINNAO2X42C7CGM7MM.jpg?smart=true&auth=7592cb965551108728150339baa2c84761d76333ddf71e2e2db13ad135169773&width=400&height=225)
A lab technician holds a PCR plate to perform Covid-19 tests at Hermes Pardini Lab amid the pandemic in Vespasiano, Brazil. Getty Images
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/ACLMWVF6PJZAPLMUJUJSFDFKDM.jpg?smart=true&auth=8beefad331714a015b55b71e3c07df3f65c05d0fde84087f8280b8fc6d6795e6&width=400&height=225)
Brazilian President Jair Bolsonaro speaks to media at Planalto Palace in Brasilia. AFP
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New South Wales police officers speak to drivers trying to cross from the state of Victoria into NSW at a checkpoint after the border was closed, in Albury, Australia. Reuters
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/AFYLAQ3ZAWXKBX7LJHHADEGIFE.jpg?smart=true&auth=15fcbec49fba10ee3365e74fdf780c81f2c96ed5bbd62080dbd5e092253b0623&width=400&height=225)
Security forces use shields during a protest against a lockdown planned for the capital this weekend in Belgrade, Serbia. Reuters
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/4VRACHECQU7Q76KGHDHGBNF5QE.jpg?smart=true&auth=231ceb77257f3a75ed864b2b55c0a3ddf979a026267e5a4015d7569adeb152b8&width=400&height=225)
A Reuters photographer holds a picture of revellers at the running of the bulls at the San Fermin festival, taken in July 2019, in front of the bullring, as a Spanish apprentice bullfighter trains at the arena during what would be the second day of the cancelled event, in Pamplona, Spain. Reuters
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/Y7257X6AF5NFWABALJP4GGLH4A.jpg?smart=true&auth=aa91a34c0dac72f826ddec8c1c87f70c6c703f4e9d9e6ac44b143ea9fde17585&width=400&height=225)
Nuria Bosch, 29, and Dria Abramson, 29, eat lunch in a social-distancing greenhouse dining pod, in the former car parking of the Lady Byrd Cafe in Los Angeles, California. Reuters
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/QUXAPXF6F66FZIMZIGUC3LURZQ.jpg?smart=true&auth=0a7552e8b77f15ccd0112052af07e5bd44acd716ae96dcd784618ae58e16566e&width=400&height=225)
A woman who is suspected of having Covid-19 sits outside El Norte Hospital, La Paz, Bolivia. Reuters
![](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/WMH73BIOTE3NQCL6YUDSKR2LMM.jpg?smart=true&auth=8afd096ef47927cced7585f25de07b252d0c4a7da458eecfcbf7d1118c7e7cda&width=400&height=225)
Circus performers of the Association of Circus Proprietors outside Downing Street, London. The association handed a petition to Prime Minister Boris Johnson urging him to allow circuses to reopen. EPA
Coronavirus: why the virus may linger in tiny particles suspended in air
Scientists have called on the WHO to consider methods of controlling airborne transmission
Robert Matthews
08 July, 2020
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