On May 7, the government announced revised quarantine and testing arrangements for inbound travellers who have been vaccinated. According to that press release , the compulsory quarantine period would be reduced for people who have not stayed in extremely high-risk or very high-risk countries. The very high-risk countries currently include the United Kingdom , whereas Group B countries, for which compulsory quarantine has been reduced to 14 days for people who have been fully vaccinated, include Bangladesh, Indonesia, Germany, France and the United States. Statistics show that the UK only had 235 cases per million people in the last seven days, whereas France had 1,774, Germany 1,141, and the United States 802 cases per million people in the last 7 days. Furthermore, the UK has currently vaccinated around 52 per cent of its population, which is a far higher rate than that of any of the other countries mentioned above. Why on earth would the government put the UK in a higher risk category and impose longer quarantine periods on travellers returning from there than other countries where the chances of catching Covid-19 are obviously much higher? Could it be that there is a political motive for this? Andrew Clements, Repulse Bay Quarantine itself impacts health I am writing to express my concerns after reading the letter “Coronavirus in Hong Kong: lack of clarity on quarantine puts undue stress on families and children” (May 5). While some might think staying in a hotel for 21 days of quarantine is like travelling overseas, or going on staycation and unwinding, it can be a traumatic experience. Imagine not being able to step outside the door, facing the same four walls every day, checking social media and seeing others go about their lives but being unable to join in. Would you be able to cope with staying alone for so long? Recently, I watched a video about the effects of not going outdoors for short periods of around a month. It turns out staying indoors weakens the immune system and increases the risk of other illnesses, including cancer. Even for students who are not in quarantine, staying at home for online lessons for months has been stressful . And in the absence of clear guidelines, people become fearful of the repercussions should they be sent to quarantine. In situations where quarantine is deemed necessary, officials should quarantine people for no longer than required, present a clear rationale for quarantine and information about the protocol, and ensure sufficient supplies are provided. Arranging for quarantine and medical surveillance at home or shortening the period spent in a quarantine centre to 14 days, supplemented by seven days at home, should also be considered for those who are not confirmed Covid-19 cases. Elvy Wong, Tuen Mun