There could be several reasons why visa rejection rates for short-term visas have increased in the post-COVID-19 era compared to the pre-COVID-19 period. It’s important to note that the specific reasons can vary from country to country and from one type of visa to another.

Here are some possible factors that may contribute to higher rejection rates:

1. Health Concerns:
   Many countries have implemented stricter health and safety measures in response to the COVID-19 pandemic. This includes requirements for proof of vaccination, negative COVID-19 tests, quarantine upon arrival, or restrictions on travelers from certain countries. Applicants who do not meet these requirements may face rejection.

2. Changing Immigration Policies:
   Some countries may have changed their immigration policies in response to economic or political factors. These changes could result in more stringent visa requirements and higher rejection rates.

3. Increased Scrutiny:
   In the post-COVID-19 era, immigration authorities may be scrutinizing visa applications more closely to ensure that travelers are not a risk to public health or national security. This increased scrutiny can lead to more rejections.

4. Economic Considerations:
   Economic factors, such as job availability and the impact of tourism on the local economy, can also influence visa policies. In times of economic uncertainty, countries may be more selective in granting visas to protect their job markets.

5. Incomplete or Inaccurate Applications:
   Visa applications that are incomplete or contain inaccurate information are more likely to be rejected. Some applicants may not be aware of the specific requirements or may make errors in their applications.

6. Limited Capacity:
   Due to COVID-19-related disruptions, some embassies and consulates may have limited capacity to process visa applications. This can result in delays and rejections.

7. Increased Competition:
   The demand for short-term visas can be highly competitive, especially if there are limited slots available or if the country is a popular tourist or business destination. Increased competition can lead to higher rejection rates.

8. Tighter Border Controls:
   Some countries have implemented stricter border controls and immigration policies as part of their response to the pandemic. This can include reduced entry quotas or more stringent eligibility criteria.

9. Geopolitical Factors:
   Geopolitical tensions or international relations may also play a role in visa rejections, as countries may restrict entry from certain nations or individuals with connections to specific countries.

It’s important for individuals applying for visas to carefully review the specific requirements and policies of the country they wish to visit and to ensure that their application is complete and accurate. Consulting with the relevant embassy or consulate and seeking legal advice if necessary can also help improve the chances of a successful visa application. Additionally, visa policies and rejection rates can change over time, so staying informed about current regulations is crucial.